Polycom Network Router DOC2237A User Manual
Polycom MGC 50/MGC 100  
Hardware & Installation Guide  
Version 9.0.4 | August 2010 | DOC2237A  
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MGC Hardware and Installation Guide  
Table of Contents  
Before You Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1  
MGC Unit Main Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3  
MGC-50/MGC-100 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4  
Scope of Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8  
Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9  
List of Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10  
Installation and Configuration Workflow . . . . . . . . . . . . . . . . . . . . . 1-11  
Hardware Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1  
MGC-100 Hardware Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2  
Unpacking and Positioning the MGC-100 . . . . . . . . . . . . . . . . . 2-2  
Mounting the MGC-100 on a 23” Rack . . . . . . . . . . . . . . . . . . . 2-4  
Mounting the MGC-100 on a 19” Rack . . . . . . . . . . . . . . . . . . . 2-6  
NEBS Standard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8  
Connecting and Setting Up the MGC-100 . . . . . . . . . . . . . . . . . 2-9  
MGC-100 Dongle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10  
Connecting to the power source . . . . . . . . . . . . . . . . . . . . . 2-10  
Connecting the MGC-100 to the LAN Network . . . . . . . . . 2-12  
Connecting the MGC-100 to the Operator Workstation (PC)  
Directly via RS-232 (Optional) . . . . . . . . . . . . . . . . . . . . . . 2-12  
Connecting the MGC-100 to the Network . . . . . . . . . . . . . 2-13  
MPI-4/8 Hardware Installation for the MGC-100 . . . . . . . . . . . 2-16  
To install the MPI-4/8 Network Interface Module: . . . . . . 2-17  
To install the MPI Box on Top of the MCU: . . . . . . . . . . . 2-17  
MGC-50 Hardware Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21  
Unpacking and Positioning the MGC-50 . . . . . . . . . . . . . . . . . 2-21  
Mounting the MGC-50 on a Rack . . . . . . . . . . . . . . . . . . . . . . . 2-23  
Connecting and Setting Up the MGC-50 . . . . . . . . . . . . . . . . . 2-26  
MGC-50 Dongle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26  
Connecting to the Power Source . . . . . . . . . . . . . . . . . . . . . 2-27  
Connecting the MGC-50 to the LAN Network . . . . . . . . . . 2-28  
i
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Table of Contents  
Connecting the MGC-50 to the Operator Workstation (PC)  
Directly via RS-232 (Optional) . . . . . . . . . . . . . . . . . . . . . 2-28  
Connecting the MGC-50 to the Network . . . . . . . . . . . . . . 2-28  
Connecting the MGC-50 to the ATM Network . . . . . . . . . 2-30  
Connecting the MGC-50 to the IP Network . . . . . . . . . . . . 2-31  
MPI-8 Hardware Installation for the MGC-50 . . . . . . . . . . . . . 2-32  
First Entry IP Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-35  
IP Configuration Change on XPEK and pSOS OS . . . . . . . . . 2-35  
Using a DOS Diskette with the Updated LAN.CFG File . 2-39  
Clocking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-41  
System Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1  
Information Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7  
MGC Manager Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9  
Power Supply Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9  
Hardware Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1  
MGC-100 Components Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2  
MGC-50 Components Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7  
Main Control Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10  
MGC-50/100 Control Unit with Removable Hard Drive . . . . . 4-12  
Removing the Control Unit from the MCU . . . . . . . . . . . . 4-12  
Control Unit Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13  
IP Configuration Change . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14  
Hard Drive Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14  
Inserting the Hard Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15  
Removing the Hard Drive . . . . . . . . . . . . . . . . . . . . . . . . . 4-15  
Hard Drive Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16  
Backplane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17  
Control Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18  
Information Highway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19  
Powerplane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19  
Power Supply Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20  
Power Module in the MGC-100 . . . . . . . . . . . . . . . . . . . . . . . . 4-20  
Power Module in the MGC-50 . . . . . . . . . . . . . . . . . . . . . . . . . 4-21  
Power Supply Cord . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21  
ii  
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MGC Hardware and Installation Guide  
Fuse/Circuit Breaker (AC Power) . . . . . . . . . . . . . . . . . . . . . . . 4-22  
Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22  
Alarms Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22  
Functional Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23  
Net-E1/Net-T1 ISDN Network Interface Module . . . . . . . . . . . 4-28  
The Net-E1/Net-T1 ISDN Network Interface Data  
Stream . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-30  
Net-2/Net-4/Net-8/Net-8L ISDN and Net-2/Net-4/Net-8  
T1-CAS Network Interface Module . . . . . . . . . . . . . . . . . . . . . 4-31  
The Net-2/Net-4/Net-8 ISDN/T1-CAS Network Interface  
Data Stream . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-33  
ATM Network Interface Module . . . . . . . . . . . . . . . . . . . . . . . 4-34  
IP and IP+ Network Interface Module . . . . . . . . . . . . . . . . . . . 4-35  
Module Port Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-36  
IP and IP+ Network Interface Module Architecture . . . . . . 4-38  
IP+ Port Capacities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-39  
The MPI-8 Network Interface Module . . . . . . . . . . . . . . . . . . . 4-40  
MPI-8 Network Interface Data Stream . . . . . . . . . . . . . . . . 4-42  
MPI Network Interface Module Architecture . . . . . . . . . . . 4-44  
MUX Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-44  
MUX Module Architecture . . . . . . . . . . . . . . . . . . . . . . . . . 4-46  
MUX+ Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-47  
MUX+ Card Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-48  
IVR/Greet & Guide Welcome Slide . . . . . . . . . . . . . . . . . . 4-49  
MUX+ Port Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-49  
MUX+ Participant Move Options . . . . . . . . . . . . . . . . . . . . 4-51  
MUX+ Resource Report . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-52  
Audio Module (Standard) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-53  
Audio Module Port Capacity . . . . . . . . . . . . . . . . . . . . . . . 4-53  
Audio Module Architecture . . . . . . . . . . . . . . . . . . . . . . . . 4-55  
Audio+ Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-56  
Audio+ Module Architecture . . . . . . . . . . . . . . . . . . . . . . . 4-57  
Audio + Port Capacities . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-57  
Video Module (Standard) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-59  
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Table of Contents  
Video Module Architecture . . . . . . . . . . . . . . . . . . . . . . . . 4-59  
Video+ Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-60  
Video+ Module Architecture . . . . . . . . . . . . . . . . . . . . . . . 4-61  
Data Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-62  
Data Module Architecture . . . . . . . . . . . . . . . . . . . . . . . . . 4-62  
Input/Output Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-63  
Greet and Guide Hardware Kit . . . . . . . . . . . . . . . . . . . . . . . . . 4-67  
Installing the Audio Message Daughter Card on the  
standard Audio Module . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-68  
Attaching the Music I/O Card to the Audio Module . . . . . 4-69  
Enabling the Audio Message Daughter Card and Music I/O  
Card in the MCU Software . . . . . . . . . . . . . . . . . . . . . . . . . 4-70  
System Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1  
Controls and Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2  
MGC Unit Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2  
LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3  
MGC Unit Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7  
Corrective Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9  
Replacing a Functional Module . . . . . . . . . . . . . . . . . . . . . . . . 5-10  
Replacing the I/O Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10  
Replacing the Fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11  
Replacing the Power Supply Modules for the MGC-100  
(including the NEBS Unit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11  
Replacing the Power Supply Module for the MGC-50 . . . . . . 5-12  
Fan Replacement for the MGC-100 . . . . . . . . . . . . . . . . . . . . . 5-15  
Fan Replacement for the MGC-50 . . . . . . . . . . . . . . . . . . . . . . 5-16  
Replacing the Main Control Module . . . . . . . . . . . . . . . . . . . . 5-17  
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-19  
Appendix A: Interfaces Pin Assignment . . . . . . . . . . . . . . . .A-1  
PRI Port Assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1  
LAN PIN Assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2  
Alarms Port Pin Assignment . . . . . . . . . . . . . . . . . . . . . . . . A-2  
RS-232 Pin Assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3  
Serial Port Connectors Pin out Assignment . . . . . . . . . . . . . A-4  
iv  
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MGC Hardware and Installation Guide  
Cables For the MPI-8 Network Interface Module . . . . . . . .A-6  
v
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Table of Contents  
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1
Before You Begin  
The MGC-50 and the MGC-100 are high performance, high capacity  
Multipoint Control Units (MCU) which support up to 48 ports for the MGC-  
50, and 96 ports for the MGC-100. They utilize a variable port bandwidth  
ranging from 56 to 1920 Kbps.  
Figure 1-1: MGC 50  
Figure 1-2: MGC 100  
1-1  
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Chapter 1 - Before You Begin  
The system meets International Telecommunication Union -  
Telecommunication Standardization Sector, (ITU-T, formerly CCITT)  
standards for multipoint multimedia bridging devices, and meets ETSI  
standards for telecommunication products. The MGC-100 DC also meets the  
NEBS Compliant Standard (when so ordered) for our clients based in the  
United States.  
The flexible architecture in the system is designed to accommodate users’  
changing multipoint needs. This system utilizes a modular “universal slot”  
platform that allows the formation of different configurations based on users’  
individual port capacity and functionality requirements.  
1-2  
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MGC Hardware and Installation Manual  
MGC Unit Main Features  
The MGC unit offers the following features:  
•
Supports a large number of ports (48 for the MGC-50, 96 for the MGC-  
100) running at 128 Kbps  
•
Universal slots, telco grade high availability with hot-swappable  
modules, redundancy, on-line upgrading and dynamic resource  
allocation  
•
•
•
Support for standard network interfaces (ISDN, ATM, T1-CAS, LAN  
and V.35 serial) for the easy integration of conference elements into  
external network management and billing systems  
Support for up to 16 operator workstations (PCs) connected to either a  
local or remote MCU; each operator workstation can be connected to  
several MGC units  
Multirate conferencing and Transcoding (audio and video, including  
high bit rate video and data bit rate conversion)  
•
•
•
•
•
•
Channel aggregation according to H.221, BONDING and Multirate (H0)  
Automatic rate detection upon endpoint connection to the conference  
H.320/H.323 video, T.120 data and Greet and Guide conferencing  
Enhanced Continuous Presence (multi-image video)  
IVR (Interactive Voice Response)  
Windows 95®/Windows 98®/Windows NT®/Windows 2000®/  
Windows XP® based operator station  
•
•
•
•
Multiple operators per conference  
Multiple conferences and MCUs per operator  
TCP/IP - LAN - Internet access  
Supports serial communication (V.35/RS-530/RS-449) (optional)  
1-3  
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Chapter 1 - Before You Begin  
MGC-50/MGC-100 Specifications  
Table 1-1 lists the specifications of the MGC-50 and the MGC-100 units.  
Table 1-1: MGC Specifications  
Physical  
MGC-50  
MGC-100  
MGC-100  
NEBS  
Height  
Width  
16”  
16”  
21”  
15”, 19” with  
mounting plate  
23” with  
mounting  
plates, 19”  
with unit at  
90°  
23” with mounting  
plates  
Depth  
19.5”  
19.5”  
19.5”  
Weight  
Up to 24 kg  
Up to 48 kg Up to 58 kg  
Free space above the  
MCU rack  
3” in standard  
installations  
3”standard It is  
installation, recommended for  
9” if a MPI-  
8 is to be  
fitted  
the installer to  
refer to the NEBS  
Standards  
IP Protocols  
MGC-50/MGC-100  
Audio  
G.711, G.722 (48), G.722.1, G.728, G.729A, G.  
723.1, Siren 7, Siren 14  
Video  
Data  
H.261, H.263 (Annexes N, F, P), H.264  
T.120  
H. 320 Protocols  
MGC-50/MGC-100  
Audio  
G.711, G.722 (48), G.722.1, G.728, G. 723.1, Siren  
7, Siren 14  
Video  
H.261, H.263 (Annexes N, F, P), H.264  
Data  
T.120  
H.243  
Cascading  
1-4  
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MGC Hardware and Installation Manual  
Table 1-1: MGC Specifications  
Channel aggregation  
H.221, BONDING, Multi-Rate (H0)  
ISDN:  
Network interfaces  
T1 PRI, E1 PRI, Multirate ISDN, NFAS, Leased  
lines-T1/E1, Switched 56  
T1-CAS  
T1-CAS lines for Audio Only connections  
ATM:  
25 (FVC.COM), 155 (FVC.COM)  
IP (H.323 and SIP):  
LAN  
Serial:  
V.35, RS449, RS530/A  
External  
Communications  
MGC-50/MGC-100  
Data rates  
56 Kbps - 1920 Kbps (E1)  
Network interfaces  
ISDN T1/ E1, ATM-25 (First Virtual), ATM-155 (First  
Virtual), T1-CAS, LAN, serial (MPI)  
MGC Manager control  
connection  
An independent LAN connection (separate from the  
Network connection)  
Clock synchronization  
Synchronizes to external network  
Local/Remote External  
Equipment  
MGC-50/MGC-100  
Operator workstations  
Reservation systems  
LAN/RS-232/Modem/Internet  
LAN/Internet/Modem  
Environment  
MGC-50/MGC-100  
Operating temperature  
Storage temperature  
Relative humidity  
Operating altitude  
Storage altitude  
10°–40°C (50°–104°F)  
-40°–70°C (40°–158°F)  
15%-90% no condensing  
Up to approx. 3,000m (10,000ft)  
Up to approx. 12,000m (40,000ft)  
1-5  
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Chapter 1 - Before You Begin  
Table 1-1: MGC Specifications  
Operating ESD  
Storage ESD  
+8kV  
+15kV  
System  
Communications  
MGC-50/MGC-100  
Integrated scheduler  
Yes  
Yes  
API to 3rd party  
reservation systems  
Conference Setup  
MGC-50/MGC-100  
(Scheduled/  
Unscheduled)  
Meet Me Per  
•
•
•
•
Conference  
MCU  
Channel  
Party  
Dial-out/Dial-in  
Yes  
Diagnostics  
MGC-50/MGC-100  
Power up  
On-line  
Yes  
Yes  
Yes  
Remote  
Serviceability /  
Reliability  
MGC-50/MGC-100  
Hot plug-in modules  
Yes  
Yes  
Front panel removable  
modules  
Power Supply  
MGC-50  
MGC-100  
DC Input  
-
-48 VDC  
1-6  
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MGC Hardware and Installation Manual  
Table 1-1: MGC Specifications  
AC Input  
100-240 VAC,  
50/60 Hz  
100-240 VAC,  
50/60 Hz  
Power Consumption  
MGC-50  
MGC-100  
AC Maximum Power  
consumption  
AC Voltage -  
10Amp at 100  
VAC, 5 Amp at  
240 VAC  
AC Voltage - 8.5 Amp at 100  
VAC and 4.2 Amp at 240 VAC  
protected by a 15 Amp circuit  
breaker.  
protected by a  
12.5 Amp fuse.  
Note: Older  
MCU units may  
have different  
power ratings.  
Contact your  
next level of  
support.  
DC Voltage - 30 Amp at 48 VDC  
protected by a 50 Amp circuit  
breaker.  
Note: Older MCU units may  
have different power ratings.  
Contact your next level of  
support.  
1-7  
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Chapter 1 - Before You Begin  
Scope of Manual  
This manual describes the MGC-50 and the MGC-100 hardware and  
installation procedure. It is intended for service engineers, system  
administrators and system operators who need to install, configure and  
maintain the MGC unit.  
Detailed information on using the system, including starting and shutting  
down the system, is provided in the MGC Manager User’s Guide.  
This manual assumes the user has the following knowledge:  
•
Familiarity with the Windows 95®, Windows 98®, Windows 2000®,  
Windows NT®, and Windows XP® environment and interface  
•
Basic knowledge of videoconferencing concepts and terminology  
The MGC Hardware and Installation Manual includes the following topics:  
•
Chapter 1 - Before You Begin  
Provides a general description of the MGC unit, its main features and  
description of the MGC Hardware and Installation Guide.  
•
•
•
•
Chapter 2 - MGC Unit Hardware Installation  
Installing the MGC unit and connecting it to the operator workstations.  
Chapter 3 - System Architecture  
Describes the system architecture and the data flow.  
Chapter 4 - Hardware Description  
Describes the various components that make up the MGC unit.  
Chapter 5 - Maintenance  
Describes the controls and LED indicators and provides maintenance  
procedures.  
•
Appendix A - Interfaces Pin Assignment  
Describes the pinout of the various MGC unit connectors.  
1-8  
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MGC Hardware and Installation Manual  
Conventions  
Before using this manual, it is important for you to understand the terms and  
conventions used:  
•
•
•
•
•
•
The term “Choose” or “Double-click” is used when you need to activate  
a menu command or a command button in the dialog box.  
The term “Select” or “Click” is used to highlight a part of the window,  
dialog box or menu that you want to be changed with your next action.  
The term “Right-click” is used when you press and release the right  
mouse button to open a pop-up menu.  
The term “Choose OK” means that you can either click the OK button  
with the mouse, or press the <Enter> key on the keyboard.  
Keyboard keys appear in capital letters, between these two symbols  
< >. For example, the Shift key appears as <Shift>.  
The plus sign (+) between two key names indicates that you must press  
and hold down one key while pressing down the second key. For  
example, “press <Alt>+<P> means that you press and hold down the Alt  
key while you press the P key.  
•
Bold type appearing in the text, or in a procedure indicates the word or  
the character that you should type into a text box from the keyboard. It is  
also used to indicate the name of the menu name or command name that  
you should select.  
•
•
Italic type appearing in the text or in a procedure indicates the menu  
name, dialog box name or field name from which an option should be  
selected or into which parameters should be entered.  
Tips and notes appear in a different typeface and between two bars. For  
example:  
This is an example of notes that you may encounter throughout this Hardware  
Manual.  
1-9  
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Chapter 1 - Before You Begin  
List of Abbreviations  
The following is the list of abbreviations used throughout this manual:  
Table 1-2: Abbreviations  
API  
Application Programming Interface  
CSU  
DPR  
ESD  
HDLC  
HSD  
IP  
Channel Service Unit  
Dual Port Ram  
Electro-Static Discharge  
High-level Data Link Control  
High Speed Data  
Internet Protocol  
ISDN  
LAN  
LED  
LSD  
MCU  
MGC  
MPI  
Integrated Services Digital Network  
Local Area Network  
Light Emitting Diode  
Low Speed Data  
Multipoint Control Unit  
Multimedia Gateway Control  
Multi Protocol Interface  
Multiplexor  
MUX  
PBX  
PRI  
Private Branch Exchange  
Primary Rate Interface  
Transmission Control Protocol  
Time Division Multiplexing  
TCP  
TDM  
1-10  
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MGC Hardware and Installation Manual  
Installation and Configuration Workflow  
The MGC unit installation and configuration process includes the following  
main steps: Hardware Installation, Software Installation, Database  
Configuration, Network Services definition and the MGC unit cards  
configuration. The Hardware Installation stage is described in this guide. The  
remaining steps are described in the MGC Administrator’s Guide, as  
described in following flowchart.  
MGC Hardware and Installation Manual,  
Chapter 2  
MGC Hardware and Installation Manual,  
Chapter 2  
MGC Administrator’s Guide,  
Chapter 2  
MGC Administrator’s Guide,  
Chapter 2  
MGC Administrator’s Guide,  
Chapter 2  
MGC Administrator’s Guide,  
Chapter 3  
MGC User’s Guide - Volume II,  
Chapter 6  
Figure 1-3: Installation and Configuration Workflow  
1-11  
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Chapter 1 - Before You Begin  
1-12  
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2
Hardware Installation  
This chapter describes the unpacking and connection of both the MGC+50  
and the MGC+100, to the ISDN, T1-CAS, H.323, MPI or serial network to  
the operator workstation (PC)  
MGC Hardware and Installation Manual,  
Chapter 2  
MGC Hardware and Installation Manual,  
Chapter 2  
MGC Administrator’s Guide,  
Chapter 2  
MGC Administrator’s Guide,  
Chapter 2  
MGC Administrator’s Guide,  
Chapter 2  
MGC Administrator’s Guide,  
Chapter 3  
MGC User’s Guide - Volume II,  
Chapter 6  
Figure 2-1: Installation and Configuration Workflow - Hardware Installation  
2-1  
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Chapter 2 - Hardware Installation  
MGC-100 Hardware Installation  
Unpacking and Positioning the MGC-100  
To unpack and position the MGC-100:  
1. When you receive your MGC-100, inspect the equipment for damage  
and verify that the components match the packing slip. If you did not  
receive a component or if there is damage to the system, notify your  
service representative immediately.  
Wood Packing Case  
Carrying Strap  
Lock in Closed Position  
Lock in Open Position  
Figure 2-1: MGC-100 package  
2. Place the MGC-100 unit on a stable flat surface in a location that meets  
the MGC environment requirements, which are:  
•
•
•
•
Operating temperature: 10°–40°C (50°–104°F)  
Humidity: 15%–90% non-condensing  
Altitude: Up to 3,000m (10,000ft)  
ESD: +8 kV  
2-2  
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MGC Hardware and Installation Manual  
3. Release the clasp locks at the bottom, and lift the MGC-100 top cover.  
Wood Packing Case  
Foam Block  
Foam Block  
Figure 2-2: Unpacking the MGC-100  
4. Lift the MGC-100 unit and remove the packaging material.  
5. Lower the MGC-100 unit, placing it on the surface.  
If the MGC-100 is a standalone unit, place it on a flat surface. If you are  
rack mounting the MGC-100, allow a minimum clearance of 3” above  
the unit. If you are rack mounting the NEBS MGC-100, the 3” above the  
unit is not needed. Refer to the NEBS Standards for clearance  
compliance.  
2-3  
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Chapter 2 - Hardware Installation  
Mounting the MGC-100 on a 23” Rack  
The MGC-100 can be mounted to a 23” rack using the two mounting plates  
that are pre-installed on the unit.  
1. Make sure that the MCU is turned OFF and it is disconnected from the  
AC or DC power.  
2. Place the MCU in a 23” rack and support it, screw the mounting brackets  
to the rack securing it with bolts and  
self-locking nuts (which the client provides).  
-or-  
If the MGC-100 was shipped without the two mounting plates that are  
usually pre-installed:  
1. Make sure that the MCU power is turned OFF and that it is disconnected  
from the AC or DC power.  
2. With a slotted screwdriver remove the five nylon plug hole covers from  
the MCU side covers.  
3. With an Allen wrench (M4), remove the five screws from the MCU side  
covers.  
4. Remove both MCU side covers.  
front  
remove  
screws  
rear  
5. Remove the plates from the both sides of the MGC by removing the  
appropriate number of functional modules to allow access to the screws.  
2-4  
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MGC Hardware and Installation Manual  
6. Unscrew both MCU the side screws and remove both side plates.  
front  
Remove  
plate  
7. From the inside of the MGC-100, screw the mounting brackets to both  
sides of the MCU, securing the screws in the mounted nuts.  
Screw mounting  
plate from the  
inside of the MGC  
(Front)  
Secure with nut  
2-5  
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Chapter 2 - Hardware Installation  
8. Place the MCU in a 23” rack and while supporting it, screw the mounting  
brackets to the rack securing it with bolts and self-locking nuts.  
When the unit is installed on a rack, the rack must be properly grounded to the  
central office ground. The rack must be grounded with two-hole compression-  
type connectors using copper conductors (tinned or untinned). Wire, bus bar or  
braided strap connectors are acceptable.  
Mounting the MGC-100 on a 19” Rack  
The MGC-100 can be mounted in a 19” rack using the mounting kit (P/N-  
KIT2026A). It is highly recommended that the 19” rack be located in an air-  
conditioned room.  
Figure 2-3 shows how to mount the MGC-100 on the 19” rack.  
19" Attachment Bar  
Figure 2-3: MCU Rack Mount  
2-6  
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MGC Hardware and Installation Manual  
Because of heat considerations, the MCU must be installed with the Control Unit  
Module placed on the left bottom.  
1. Check that all the parts are in the kit.  
The kit should contain the following items:  
Table 2-1: 19” Rack Mounting Kit  
Item #  
Polycom P/N  
Description  
Quantity  
1
MEC2063A  
23" TO 19" Mounting Bar MGC-  
100 at 90 Degrees  
2
2
3
4
SCR2005A  
WAS2003A  
WAS2004A  
Screw 10-32 x 1/2” Allen S/H  
ST/ST  
8
8
8
Washer M5 Spring Latch Loc.  
ST\ST  
Washer M5 Flat ST/ST  
2. Make sure that the MCU power is turned OFF and it is disconnected  
from the AC and DC power.  
Remove the side covers as described on page 2-4.  
3. If the MCU is a standalone unit, you must first remove the side covers,  
and add the mounting brackets to a 23” rack (see pages 2-4 to 2-6).  
4. Attach the two mounting bars to the MCU as follows:  
a. Fit the spring washer (Item #3) onto the screw (#2).  
b. Fit the flat washer (Item #4) onto the screw.  
Item #4  
Item #3  
c. Take the two mounting bars (Item #1) from the kit and attach them  
to the MGC-100 unit with the screws (with the attached washers, as  
described in step b).  
2-7  
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Chapter 2 - Hardware Installation  
5. Carefully rotate the MGC-100 counterclockwise 90°, making sure the  
Control Unit is at the bottom left.  
6. While supporting the MGC-100, place it on the 19” rack and screw the  
brackets to the rack, securing it with the screws and nuts supplied with  
the rack.  
NEBS Standard  
For installations based within the United States, an MGC-100 DC NEBS  
compliant system is available. The NEBS compliant systems differs in its  
construction of the frame and the power supply. All else remains the same.  
The construction of the MGC-100 is 12 U’s, (1 U = 4.3 cm) which makes it  
higher by 3 U’s than the original frame of the MGC-100. This design allows  
for a cushion of air to be present, ensuring safety in case of a heat related  
problem.  
In addition, the power supply is also designed differently by allowing the  
circulation of cool air, providing a safety tolerance in case of a heat related  
problems.  
Use only shielded LAN cables where the shield is grounded at both ends  
when connecting to the IO LAN port of the IP+48 on the MGC+ rear panel.  
CONT  
NET-E1  
MUX  
MUX  
DATA  
DATA  
VIDEO  
VIDEO  
VIDEO  
VIDEO  
AUDIO  
AUDIO  
AUDIO  
AUDIO  
NET-8  
NET-8  
NET-8  
Critical  
Major  
Minor  
L0  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Line  
Line  
Line  
Line  
Line  
Line  
Line  
Line  
1
2
3
4
5
6
7
8
Line  
Line  
Line  
Line  
Line  
Line  
Line  
Line  
1
2
3
4
5
6
7
8
Line  
Line  
Line  
Line  
Line  
Line  
Line  
Line  
1
2
3
4
5
6
7
8
Power  
L1  
Line  
Line  
A
B
L2  
L3  
Figure 2-4: NEBS Standard Unit Front View  
2-8  
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MGC Hardware and Installation Manual  
Connecting and Setting Up the MGC-100  
Use the MGC-100 rear panel diagram below for reference.  
Slot A  
Main Control  
Module Cover  
RS232  
Connectors  
Network  
Connectors  
MUSIC  
LINE IN  
COM  
1
ALARMS  
COM  
LAN  
10/100 Mbits  
Main Switch  
and Circuit Breaker  
AC Inlet  
Dry Contacts  
RJ45 Connector  
Fan  
Figure 2-5: MGC-100 Rear Panel with External Connectors  
To connect the MGC-100 to the network and power source and set up the  
system the following procedures are performed:  
•
Connecting the MGC unit to the power source (AC inlet or -48DC power  
distribution unit)  
•
•
Connecting the MGC unit to the LAN Network  
Connecting the MGC unit to the Operator Workstation (PC) directly via  
RS-232 (optional)  
•
Connecting the MGC unit to the network(s)  
2-9  
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Chapter 2 - Hardware Installation  
MGC-100 Dongle  
MGC-100 is shipped with a serial dongle installed on COM1 on the MCU  
rear panel. The dongle is required for normal operation of the MCU. If the  
dongle is missing, please contact support.  
Connecting to the power source  
You can connect to an AC Inlet or to DC power supply according to the power  
system used in your site. Follow the steps appropriate to your power system.  
The following restrictions apply to the conductors and connectors that may be  
used to ground the unit when rack mounted:  
•
When using bare conductors, they must be coated with an appropriate  
antioxidant compound before crimp connections are made. Tinned,  
solder-plated or silver-plated connectors do not have to be prepared in  
this manner.  
•
•
The same bolt assemblies should not secure multiple connectors.  
Listed fastening hardware must be compatible with the materials being  
joined and must be preclude loosening, deterioration and electrochemical  
corrosion of the hardware and joint materials.  
To connect to the AC Inlet:  
1. Make sure the power switch is OFF. Insert the power cable into the  
power connector on the rear panel of the MGC-100 unit.  
Main Switch  
AC Inlet  
2. Insert the power cable into the power source socket.  
3. Turn on the power by pressing on the power switch located on the rear  
panel of the MGC-100 unit.  
2-10  
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MGC Hardware and Installation Manual  
To connect to the -48DC power system:  
1. Make sure the power switch is OFF. Turn off the DC power distribution  
unit.  
2. Using the three wires 10 AWG cable running from the DC power  
distribution unit, connect the black wire into the -48IN terminal block  
and the red wire to the -48V RTN terminal block.  
3. Connect the green or green-yellow wire to the system single-point  
“Ground” screw.  
COM  
Ground  
ON  
OFF  
+
ON  
-48V -48V  
IN  
RTN  
OFF  
+
-48V -48V  
IN  
RTN  
If the unit is rack mounted, the single-point ground on the MCU must be  
connected to the rack with a single conductor and attached as to prevent  
loosening.  
When using bare conductors, they must be coated with an appropriate  
antioxidant compound before crimp connections are made. Tinned,  
solder-plated or silver plated connectors do not have to be prepared in  
this manner.  
4. Turn on the DC power distribution unit.  
2-11  
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Chapter 2 - Hardware Installation  
5. Turn on the power by pressing on the power switch located on the rear  
panel of the MGC-100 unit.  
Connecting the MGC-100 to the LAN Network  
Connect one end of a network cable to the LAN connector on the rear panel of  
the MGC-100 and the other end to the network.  
Connecting the MGC-100 to the Operator Workstation (PC) Directly  
via RS-232 (Optional)  
Connect one end of an RS-232 cable to the COM2 connector on the front  
panel of the MGC-100 Control Unit and the other end to the serial port of the  
operator station (see RS-232 Pin Assignment, A-3).  
2-12  
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MGC Hardware and Installation Manual  
Connecting the MGC-100 to the Network  
To connect the MGC-100 to the ISDN network or T1-CAS Network:  
The ISDN network is optional. If the MGC-100 has to be connected to the public  
ISDN network then an external CSU or similar equipment is needed.  
T1-CAS network is optional. It allows you to connect Audio Only participants to  
conferences via T1-CAS lines. It uses the same network connections as ISDN  
and the procedure described below is applicable to both ISDN and T1-CAS  
lines.  
•
Connect the 8-pin RJ-45 connector of the network cable to the NET  
RJ-45 jack on the rear panel of the MGC-100. Repeat this step for each  
of the ISDN network lines to be connected to the Network Interface card  
installed in the MCU.  
ISDN Network connection  
for 4 spans  
ISDN network  
connection  
ISDN Network connection  
for 8 spans  
Figure 2-6: ISDN network connection  
Leased lines should be connected using an adapter with a screw  
connector with solid conductor wires or a similar adapter.  
•
Connect one side of the adapter to the NET RJ-45 jack on the rear panel  
of the MGC-100. Then connect the leased line wires to the other side of  
the adapter.  
The ISDN and T1-CAS network properties must be defined in the Network  
Services. For details, see the MGC Administrator’s Guide, Chapter 3.  
2-13  
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Chapter 2 - Hardware Installation  
To connect the MGC-100 to the ATM network:  
The MGC-100 can be connected to an ATM network. The type of connection  
being used differs according to the ATM Network Interface card installed in  
the MCU.  
If an ATM-25 network interface card is installed, connect the 8-pin  
RJ-45 connector of the network cable to the NET RJ-45 jack on the rear panel  
of the MGC-100.  
Figure 2-7: ATM-25 network connection  
If an ATM-155 network interface card is installed, first remove the rubber  
plug covering the jack. Then connect the fiber optics cable connector to the  
jack on the rear panel of the MGC-100.  
Figure 2-8: ATM-155 network connection  
The ATM network properties must be defined in the Network Services, For more  
details, see the MGC Administrator’s Guide, Chapter 3.  
2-14  
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MGC Hardware and Installation Manual  
To connect the MGC-100 to the IP network:  
If an IP network Interface card is installed in the MGC-100, connect the 8-pin  
RJ-45 connector of the LAN network cable to the LAN-323 RJ-45 jack on the  
rear panel of the MGC-100.  
Figure 2-9: LAN H.323 network connection  
When installing a NEBS compliant system, use only shielded LAN cables where  
the shield is grounded at both ends when connecting to the IO LAN port of the  
IP+48 on the MGC+ rear panel.  
The IP network properties must be defined in the IP Network Service. For  
details, see MGC Administrator’s Guide, Chapter 3.  
2-15  
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Chapter 2 - Hardware Installation  
MPI-4/8 Hardware Installation for the MGC-100  
The MPI-4/8 (Multi Protocol Interface) Network Interface card is inserted  
into the MGC-100 unit.  
The MPI box may be mounted on top of the MGC-100 using mounting  
brackets, or on a separate 19” or 23” rack, as can be seen in Figure 2-8. When  
installed on a 19” rack, the MPI box can be mounted directly on the rack.  
When installed on a 23” rack, a mounting plate must be used. If the MGC-100  
is rack mounted, there must be at least 6” free space above the MGC-100 to  
be able to install the MPI Box on top of the MGC unit.  
MPI Box  
in 19" Rack  
Mounting  
Plate  
C
ONT  
PRI  
-
8
y
MG-323  
AUDI  
O
AUDI  
O
VIDEO  
VIDEO  
VIDEO  
VIDEO  
Critical  
ACCORD  
MGC-50  
Stb  
St by  
St by  
St by  
St b  
y
St b  
y
Stb  
y
Stb  
y
Majo  
Mino  
L0  
r
r
Fail  
Act  
Fa  
il  
Fa  
il  
Fa  
il  
Fa  
il  
Fa  
il  
Fail  
Fail  
i
v
e
Active  
Active  
Acti  
ve  
Acti  
ve  
Acti  
ve  
Acti  
ve  
Acti  
ve  
Line  
Line  
Line  
Line  
Line  
Line  
Line  
Line  
1
2
3
4
5
6
7
8
Powe  
r
L
L
1
2
PWR  
OUT  
Figure 2-10: MPI Box rack mounting options  
2-16  
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MGC Hardware and Installation Manual  
To install the MPI-4/8 Network Interface Module:  
1. Slide the MPI-4/8 Network Interface module into a free slot in the MGC  
front panel.  
2. Push the MPI-4/8 Network Interface module firmly into the Backplane,  
making sure it is properly seated in its slot.  
3. Tighten the screws on the front panel of the MGC-100 that secure the  
MPI-4/8 Network Interface module.  
To install the MPI Box on Top of the MCU:  
1. Turn OFF power to the MCU and unplug it from AC power.  
2. If the MCU is rack mounted, disconnect all the external cables, dismount  
the MCU from the rack and place it on a desktop or work table.  
If it is a standalone unit, remove the MCU side panels.  
3. Remove the two Phillips screws on each side of the MCU (near the rear  
panel).  
rear  
remove  
screws  
front  
2-17  
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Chapter 2 - Hardware Installation  
4. Place the mounting bracket on top of the MCU aligning it against the  
screw openings as shown below and tighten the screws.  
rear  
tighten  
screws  
front  
5. Mount the bracket on the other side of the MCU (repeat step 4).  
6. Place the MPI box with its four 160-pin connectors facing the MCU front  
panel between the two mounting brackets. Secure it with the screws  
supplied with the MPI Box.  
rear  
front  
2-18  
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7. If the MCU is standalone, reassemble the side panels.  
If the MCU is rack mounted, mount the unit on the rack and connect all  
the external cables.  
PORTS  
1-4  
PORTS  
9-12  
PORTS  
5-8  
PORTS  
13-16  
CONT  
NET-8  
NET-8  
NET-8  
NET-E1  
MPI  
MPI  
DATA  
DATA  
VIDEO  
VIDEO  
VIDEO  
VIDEO  
AUDIO  
AUDIO  
AUDIO  
AUDIO  
Critical  
Major  
Minor  
L0  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
MGC-100  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
A
B
A
Line  
Line  
1
2
Line  
Line  
1
2
Line  
Line  
1
2
Line  
Line  
Line  
Line  
Line  
Line  
3
4
5
6
7
8
Line  
Line  
Line  
Line  
Line  
Line  
3
4
5
6
7
8
Line  
Line  
Line  
Line  
Line  
Line  
3
4
5
6
7
8
B
Power  
L1  
Line  
Line  
A
B
L2  
L3  
PWR  
IN OUT  
PWR  
PWR  
IN OUT  
IN OUT  
8. Using the cable provided with the MPI kit, connect the 160-pin  
connector to Port A of the MPI-8 Network Interface front panel. Connect  
the other end of the cable to a (Ports 1-4) 160-pin connector of the MPI  
Box; by doing this procedure we have utilized the MPI Box as a MPI-4.  
9. Using a second cable, connect the angled 160-pin connector to Port B of  
the MPI-8 Network Interface front panel. Connect the other end of the  
cable to B (Ports 5-8) 160-pin connector of the MPI Box.  
Using this procedure we have utilized the MPI Box as a MPI-8.  
PORTS  
1-4  
PORTS  
9-12  
PORTS  
13-16  
PORTS  
5-8  
CONT  
NET-8  
NET-8  
NET-8  
NET-E1  
MPI  
MPI  
DATA  
DATA  
VIDEO  
VIDEO  
VIDEO  
VIDEO  
AUDIO  
AUDIO  
AUDIO  
AUDIO  
Critical  
Major  
Minor  
L0  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Sy  
Fl  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
MGC-100  
Active  
Active  
Active  
Activ
ctive  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
A
B
A
Line  
Line  
Line  
Line  
Line  
Line  
Line  
Line  
1
2
3
4
5
6
7
8
Line  
Line  
Line  
Line  
Line  
Line  
Line  
Line  
1
2
3
4
5
6
7
8
Line  
Line  
Line  
Line  
Line  
Line  
Line  
Line  
1
2
3
4
5
6
7
8
B
Power  
L1  
Line  
Line  
A
B
L2  
L3  
PWR  
IN OUT  
PWR  
PWR  
IN OUT  
IN OUT  
2-19  
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Chapter 2 - Hardware Installation  
10. Connect the serial cable running from the DCE to the appropriate 37-pin  
connector on the rear panel of the MPI Box. If dialing is used, connect  
the appropriate cable from the DCE to the 25-pin connector on the rear  
panel of the MPI Box.  
Whenever the MGC unit is used as a DCE and connected straight to an  
endpoint the serial data stream flows from the endpoint (DTE) through  
the serial connector to the MPI box. The connections stay the same,  
meaning; the endpoint is connected to the back of the MPI box by way of  
the 37-pin connector, and the other side of the MPI box is then connected  
by way of the 160-pin connector to the MPI card in the MGC unit. For  
more information, refer to Chapter 4, “The MPI-8 Network Interface  
Module” on page 4-40.  
•
•
If V.35 or RS-530 cable is used, attach the special adapter (provided with the  
kit) to the 37-pin prior to connecting the serial cable from the DCE.  
The serial (MPI) network properties must be defined in the Network  
Services, For details, see MGC Administrator’s Guide, Chapter 3.  
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MGC-50 Hardware Installation  
Unpacking and Positioning the MGC-50  
To unpack and position the MGC-50:  
1. When you receive your MGC-50, inspect the equipment for damage and  
verify that the components match the packing slip. If you did not receive  
a component or if there is damage to the system, notify Polycom  
immediately.  
Wood Packing Case  
Carrying Strap  
Lock in Closed Position  
Lock in Open Position  
Figure 2-11: MGC-50 package  
2. Place the MGC-50 unit on a stable flat surface in a location that meets  
the MGC-50’s environment requirements, which are:  
—
—
—
—
Operating temperature: 10°–40°C (50°–104°F)  
Humidity: 15%–90% noncondensing  
Altitude: Up to 3,000m (10,000ft)  
ESD: +8 kV  
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Chapter 2 - Hardware Installation  
3. Release the clasp locks at the bottom, and lift the MGC-50 top cover.  
Wood Packing Case  
Foam Blocks  
Foam Blocks  
Figure 2-12: Unpacking the MGC-50  
4. Lift the MGC-50 unit and remove the package base.  
5. Lower the MGC-50 unit, placing it on the surface.  
If you are rack mounting the MGC-50, allow a minimum clearance of 3  
inches above the unit.  
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MGC Hardware and Installation Manual  
Mounting the MGC-50 on a Rack  
The MGC-50 can be mounted in a 19” rack using two mounting plates (Kit  
2012A). The side plates are usually mounted when shipped, but if not, follow  
the directions below to install the mounted plates on the MGC-50 and then  
mount the MGC-50 on the 19” rack.  
To install and mount the MGC-50:  
1. Make sure that the MGC-50 power is turned OFF and it is disconnected  
from the AC power.  
2. Remove the five nylon plug hole covers from the MGC-50 protective  
side covers (using a slotted screwdriver).  
3. Using an Allen wrench (M4), remove the five screws from the MGC-50  
side covers.  
4. Remove the MGC-50 side covers from both sides.  
front  
remove  
screws  
rear  
5. To remove the plate from both MGC-50 sides, the side screws have to be  
removed. To remove the screws from the left side the main control  
module and the power supply must be removed first. These procedures  
are described in Chapter 5 of this manual. For detailed procedures, see  
Chapter 5, “Replacing the Main Control Module” on page 5-17. For  
instructions on how to remove the power supply see Chapter 5,  
“Replacing the Power Supply Module for the MGC-50” on page 5-12.  
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Chapter 2 - Hardware Installation  
6. Once the Main Control Module, the power supply module and the boards  
are removed, unscrew the side screws from inside the MGC-50, and then  
remove the plate from both MGC-50 sides.  
Front  
Remove  
plate  
Rear  
7. From the inside of the MGC-50, screw the mounting bracket to the side  
of the MGC-50, securing the screws in the mounted nuts.  
Screw mounting  
plate from the  
inside of the MGC  
(Front)  
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MGC Hardware and Installation Manual  
8. To remove the plate from the right side of the MGC unit remove the  
appropriate number of functional modules to allow access to the screws.  
9. From the inside of the MGC-50, screw the mounting bracket to the side  
of the MGC-50, securing the screws with the mounted nuts.  
10. Insert the functional modules removed earlier into the MGC-50.  
11. Mount the Power Supply module and Main Control Module back in their  
place as described in Chapter 5, “Replacing the Main Control Module,”  
page 5-18 and “Replacing the Power Supply Module,” page 5-12.  
12. Place the MGC-50 in a 19” rack and while supporting it, screw the  
mounting brackets to the rack securing it with nuts.  
MGC-50  
in 19" Rack  
C
O
NT  
P
RI-8  
MG-3  
2
3
A
UDIO  
A
UDIO  
V
I
D
E
O
V
I
D
E
O
V
IDE  
O
y
V
IDE  
O
y
Critica  
l
ACCORD  
MGC-50  
S
t
b
y
St  
b
y
St  
by  
St  
by  
S
t
b
y
S
t
b
y
Stb  
Stb  
Majo  
r
r
Fail  
ctive  
Fail  
ctive  
Fail  
ctiv  
Fail  
ctiv  
Fail  
ctiv  
Fail  
ctiv  
Fail  
ctive  
Fail  
ctive  
Min  
0
o
A
A
A
e
A
e
A
e
A
e
A
A
L
Mounting  
Plate  
L
L
L
L
L
L
L
L
in  
e
1
2
3
4
5
6
7
8
ine  
ine  
ine  
P
ower  
ine  
L1  
in  
e
L2  
ine  
ine  
PWR  
OUT  
2-25  
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Connecting and Setting Up the MGC-50  
Use the MGC-50 rear panel diagram below for reference.  
Main Control  
Module Cover  
IO Card  
COM  
1
LAN  
Fuse  
Main Switch  
Fan  
RJ45  
Connector  
AC Inlet  
Figure 2-13: MGC-50 Rear Panel with External Connectors  
To connect the MGC-50 to the network and power source and set up the  
system the following procedures are performed:  
•
•
•
Connecting the MGC unit to the power source (AC inlet)  
Connecting the MGC unit to the LAN Network  
Connecting the MGC unit to the Operator Workstation (PC) directly via  
RS-232 (optional)  
•
Connecting the MGC unit to the network(s)  
MGC-50 Dongle  
MGC-50 is shipped with a serial dongle installed on COM1 on the MCU rear  
panel. The dongle is required for normal operation of the MCU. If the dongle  
is missing, please contact support.  
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MGC Hardware and Installation Manual  
Connecting to the Power Source  
To connect to the AC Inlet:  
1. Make sure that the power switch located on the rear panel of the MGC  
unit is off.  
2. Insert the power cable into the power connector on the rear panel of the  
MGC-50 unit.  
Main Switch  
AC Inlet  
3. Insert the power cable into the power source socket.  
4. Turn on the power by pressing on the power switch located on the rear  
panel of the MGC-50 unit.  
If the unit is rack mounted, the single-point ground on the MCU-50 must  
be connected to the rack with a single conductor and attached so that it  
prevents loosening.  
The following restrictions apply to the conductors and connectors that  
may be used to ground the unit when rack mounted:  
—
When using bare conductors, they must be coated with an  
appropriate antioxidant compound before crimp connections are  
made. Tinned, solder-plated or silver plated connectors do not have  
to be prepared in this manner.  
—
—
Multiple connectors should not be secured with the same bolt  
assemblies.  
Listed fastening hardware must be compatible with the materials  
being joined and must avoid loosening, deterioration and  
electrochemical corrosion of the hardware and joint materials.  
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Chapter 2 - Hardware Installation  
Connecting the MGC-50 to the LAN Network  
Connect one end of a network cable to the LAN connector on the rear panel of  
the MGC and the other end to the network.  
Connecting the MGC-50 to the Operator Workstation (PC) Directly via  
RS-232 (Optional)  
Connect one end of an RS-232 cable to the COM 2 connector on the front  
panel of the MGC Control Unit and the other end to the serial port of the  
operator station (See RS-232 Pin Assignment, A-3).  
Connecting the MGC-50 to the Network  
To connect the MGC-50 to the ISDN network and T1-CAS network:  
This is an optional Network Interface Card. If the MGC-50 has to be connected  
to the public ISDN network then an external CSU or where required, similar  
equipment is needed.  
T1-CAS network is optional. It allows you to connect Audio Only participants to  
conferences via T1-CAS lines. It uses the same network connections as ISDN  
and the procedure described below is applicable to both ISDN and T1-CAS  
lines.  
•
Connect the 8-pin RJ-45 connector of the network cable to the NET  
RJ-45 jack on the rear panel of the MGC. Repeat this step for each of the  
ISDN network lines to be connected to the Network Interface card  
installed in the MCU.  
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MGC Hardware and Installation Manual  
ISDN Network connection  
for 4 spans  
ISDN network  
connection  
ISDN Network connection  
for 8 spans  
Figure 2-14: ISDN network connection  
•
Leased lines should be connected using an adapter with a screw  
connector for solid conductor wires with a diameter in the range 0.4 to  
0.6 mm. Use Polycom P/N CBL0602A or similar adapter.  
Connect one side of the adapter to the NET RJ-45 jack on the rear panel  
of the MGC. Then connect the leased line wires to the other side of the  
adapter.  
The ISDN and T1-CAS network properties must be defined in the Network  
Services. For details, see the MGC Administrator’s Guide, Chapter 3.  
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Chapter 2 - Hardware Installation  
Connecting the MGC-50 to the ATM Network  
The MGC-50 can be connected to an ATM network. The type of connection  
used differs according to the ATM Network Interface card installed in the  
MCU.  
If an ATM-25 network interface card is installed, connect the 8-pin  
RJ-45 connector of the network cable to the NET RJ-45 jack on the rear panel  
of the MGC.  
Figure 2-15: ATM-25 network connection  
If an ATM-155 network interface card is installed, first remove the rubber  
plug covering the jack. Then connect the fiber optics cable connector to the  
jack on the rear panel of the MGC.  
Figure 2-16: ATM -155 network connection  
The ATM network properties must be defined in the Network Services, for  
details, see the MGC Administrator’s Guide, Chapter 3.  
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Connecting the MGC-50 to the IP Network  
If an IP network Interface card is installed in the MGC, connect the 8-pin  
RJ-45 connector of the LAN network cable to the LAN-323 RJ-45 jack on the  
rear panel of the MGC.  
Figure 2-17: LAN IP network connection  
The IP network properties must be defined in the IP Network Service. For  
details, see MGC Administrator’s Guide, Chapter 3.  
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MPI-8 Hardware Installation for the MGC-50  
The MPI-8 Network Interface card is inserted into the MGC-50.  
The MPI box is mounted on a 19” rack together with the MGC-50, as can be  
seen in Figure 2-15. The MPI box is mounted directly on the rack, above the  
MGC-50, leaving at least 6” free space above the MGC-50. For details, on  
how to mount the MGC-50, refer to the section “Mounting the MGC-50 on a  
Rack” on page 2-23.  
MPI Box  
in 19" Rack  
MPI Box  
CONT  
PRI-8  
MG-323  
AUDIO  
AUDIO  
V
IDEO  
VIDEO  
VIDEO  
VIDEO  
C
r
itical  
ACCORD  
MGC-50  
S
t by  
Stby  
Fail  
Stby  
Fai  
Stby  
Fail  
S
t by  
S
t by  
S
t by  
S
t b  
y
Major  
Minor  
L0  
Fa  
il  
l
Fa  
il  
Fa  
il  
Fa  
il  
Fa  
il  
Active  
A
ctive  
A
ctive  
A
ctive  
Active  
Active  
Acti  
ve  
Acti  
ve  
Line  
Line  
1
2
3
4
5
6
7
8
L
L
L
L
L
L
ine  
ine  
ine  
ine  
ine  
ine  
Power  
L1  
L2  
Mounting  
Plate  
PWR  
OUT  
Figure 2-18: MPI Box mounting option  
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MGC Hardware and Installation Manual  
To install the MPI-8 Network Interface Module:  
1. Slide the MPI-8 Network Interface module into a free slot in the MCU  
front panel.  
2. Push the MPI-8 Network Interface module firmly into the Backplane,  
making sure it is properly seated in its slot.  
3. Tighten the screws on the front panel of the MGC-50 that secure the  
MPI-8 Network Interface module.  
To mount the MPI Box on the Rack for the MGC-50:  
1. Turn OFF power to the MCU and unplug it from AC power.  
2. If the MCU is rack mounted, disconnect all external cables, dismount the  
MCU from the rack and place it on a desktop or work table  
3. Place the MPI box with is four 160-pin connectors facing the MGC-50  
front panel between the two rails of the rack. Secure it to the rack with  
the screws supplied with the MPI Box.  
PORTS  
1-4  
PORTS  
9-12  
PORTS  
5-8  
PORTS  
13-16  
4. Connect all the external cables to the MPI box:  
Using the cable provided with the MPI kit, connect the 160-pin  
connector to Port A of the MPI-8 Network Interface front panel. Connect  
the other end of the cable to a (Ports 1-4) 160-pin connector of the MPI  
Box. Again, by doing this procedure we have utilized the MPI Box as a  
MPI-4.  
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Using a second cable, connect the 160-pin connector to Port B of the  
MPI-8 Network Interface front panel. Connect the other end of the cable  
to B (Ports 5-8) 160-pin connector of the MPI Box. By doing this  
procedure we have utilized the MPI Box as a MPI-8.  
PORTS  
1-4  
PORTS  
9-12  
PORTS  
5-8  
PORTS  
13-16  
CONT  
PRI-8  
MPI  
AUDIO  
AUDIO  
VIDEO  
VIDEO  
VIDEO  
VIDEO  
Critical  
Major  
Minor  
L0  
ACCORD  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fa
Sby  
ail  
Stby  
Fail  
Stby  
Fail  
MGC-50  
Active  
Active  
Active  
Active  
ctive  
Active  
Active  
Active  
Line  
Line  
1
2
Line  
Line  
Line  
Line  
Line  
Line  
3
4
5
6
7
8
Power  
L1  
L2  
L3  
PWR  
OUT  
5. Connect the serial cable running from the DCE to the appropriate 37-pin  
connector on the rear panel of the MPI Box (If the endpoint is a DCE,  
then connect this to the MPI Box. For more information, refer to chapter  
4). If dialing is used, connect the appropriate cable from the DCE to the  
25-pin connector on the rear panel of the MPI Box.  
•
•
If the V.35 or RS-530 cable is used, attach the special adapter (provided with  
the kit) to the 37-pin prior to connecting the serial cable from the DCE.  
The serial (MPI) network properties must be defined in the Network  
Services, for details, see MGC Administrator’s Guide, Chapter 3.  
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First Entry IP Configuration  
This following section describes the first entry IP Configuration for  
pSOSystem and XPEK Operating Systems.  
IP Configuration Change on XPEK and pSOS OS  
1. Connect a Hub or cross-over LAN cable between the laptop’s LAN  
connection and the LAN connection of the Control Unit.  
2. On the laptop, click Control Panel ->Network Connection->Local  
Area Connection.  
3. In the Local Area Connection - General dialog box, click the Properties  
button.  
4. In the Local Area Connection Properties dialog box and click Use the  
following IP address.  
5. Type the IP address 129.254.4.7 (of the laptop as part of the network  
segment on the MCU).  
6. Click OK.  
7. Run the MGC Manager application.  
8. Define a new MCU:  
a. In the Browser pane, right-click the MCUs Network icon, and then  
click New MCU.  
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Chapter 2 - Hardware Installation  
The Add MCU dialog box opens.  
b. In the Name box, enter the name of the MCU.  
Specify a name that clearly identifies the MCU.  
c. In the IP Address box, enter the factory-setting IP  
Address:129.254.4.8.  
d. Click OK.  
The new MCU is added to the MCUs list.  
9. In the MCUs list, double-click the MCU icon to connect to it.  
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10. Modify the IP address of the MCU unit as allocated by the network  
administrator. This is the IP address with which the MCU is identified on  
the LAN site:  
a. Right-click the MCU icon, and then click IP Configuration.  
The IP Configuration dialog box opens.  
b. The following parameters should be modified to match the actual  
network:  
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Table 2-2: IP Configuration Options  
Option  
Description  
IP Address  
The system displays the currently defined IP  
address. Enter the IP address allocated to the  
MCU by the network administrator.  
Subnet Mask  
Enter the Subnet Mask of the MCU.  
Default Gateway  
Enter the IP Address of the default gateway/  
router.  
11. Click OK.  
12. Exit the MGC Manager and switch OFF the MCU.  
13. Disconnect the MCU from the cross-over cable.  
14. Connect the MCU to your site’s network.  
15. Switch ON the MCU.  
a. Right-click the MCU icon, and then click Properties.  
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The MCU Properties dialog box opens.  
The current MCU name.  
To modify, type a new  
name  
MCU IP address. Enter  
the IP address of the MCU  
as allocated by the  
network administrator  
b. Enter the IP address of the MCU as you have defined in the IP  
Configuration.  
c. Click OK.  
Using a DOS Diskette with the Updated LAN.CFG File  
1. Using Windows Notepad, create a new text file with the following text:  
IP_ADDRESS = aaa.bbb.ccc.ddd  
NETWORK_MASK = aaa.bbb.ccc.ddd  
DEFAULT_GATEWAY = aaa.bbb.ccc.ddd,  
where aaa, bbb, ccc, and ddd are numbers between 0 to 255, as follows:  
Table 2-3: IP Configuration Options  
Option  
Description  
IP Address  
Enter the IP address allocated to the MCU by  
the network administrator.  
Subnet Mask  
Enter the IP address of the subnet mask.  
Enter the IP address of the default gateway.  
Default Gateway  
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Chapter 2 - Hardware Installation  
2. Save the information, creating a text file named LAN.CFG.  
3. Copy the file to an empty DOS diskette.  
4. Turn on the MCU and wait for the Power LED to blink.  
5. Insert the DOS diskette to the MCU diskette drive.  
6. The MCU reads information from the diskette several times. Wait for the  
floppy to stop blinking.  
7. Remove the diskette from the diskette drive.  
8. Connect the MCU to your site’s network.  
9. Define a new MCU using the IP address you have entered in the  
LAN.CFG file:  
a. In the Browser pane, right-click the MCUs Network icon, and then  
click New MCU.  
The Add MCU dialog box opens.  
b. In the Name box, enter the name of the MCU. Specify a name that  
clearly identifies the MCU.  
c. In the IP Address box enter the default IP Address of the MCU as  
entered in the LAN.CFG file.  
d. Click OK.  
The new MCU is added to the MCUs list.  
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Clocking  
To be able to work with the network connected to the MCU you need to  
synchronize the system clock with the network clock. This is done in two  
steps:  
•
Selecting the network type according to which the system clock will  
synchronize. Only one system type may be selected for clocking. The  
clock source is then defined in the “system cfg”.  
•
Selecting the spans of the selected network that will act as Master and  
Backup clocks. The Master and the Backup clock must be set on spans of  
the same network type.  
For more details regarding the clocking setup, see the MGC Administrator’s  
Guide, “Clocking” in Chapter 5.  
You have completed the hardware installation. The next step in the  
installation procedure is to install the MGC Manager software. For more  
information, refer to the MGC Administrator’s Guide, Chapter 2.  
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3
System Architecture  
The MGC unit is designed to provide maximum reliability, minimum  
interruptions, and effortless maintenance. Removable active components are  
accessed via the front panel to provide quick and easy serviceability.  
Redundant power supplies are easily accessed via the front panel, ensuring a  
fail safe operation (the MGC-50 is not redundant, therefore not hot-  
swappable). Network connections on the back of the unit enable easy  
module removal and prevent accidental disconnection.  
All Functional Modules are front-removable and hot-swappable, allowing  
servicing functions to be performed while the system is in operation.  
The operator accesses the MGC unit from an operator work station which is  
connected to the MGC unit via an Ethernet interface or an RS-232 interface,  
as shown in Figure 3-1, “MGC interfaces”.  
LAN / WAN / RS-232  
MGC-50  
Operator Workstation  
MGC-100  
Figure 3-1: MGC interfaces  
Figure 3-2, “MGC-100 Components” on page 3-2 and Figure 3-3, “MGC-50  
components” on page 3-3 show the internal layout of the MGC-100 and the  
MGC-50, respectively. All of the MGC modules and cards connect to the  
backplane.  
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Chapter 3 - System Architecture  
The MGC Unit is made up of:  
•
•
•
•
Main Control Module, located at the top left of the unit when viewed  
from the front  
Functional Modules, located to the right of the Main Control Module  
when the unit is viewed from the front  
Power Supply Module, located underneath the Main Control Module and  
Functional Modules  
Input/Output cards, located behind the backplane opposite the Functional  
Modules.  
The various modules communicate with each other via the Backplane. The  
Control Bus and Information Highway are implemented on the Backplane.  
Figure 3-2 describes the functional block diagram of the MGC-100  
components.  
Backplane  
H.323 I/O  
H.323 Network I/F  
Rear  
ATM I/O  
ATM Network I/F  
NET I/O  
ISDN Network I/F  
MUX  
MUSIC I/O  
Audio  
Video  
Data  
Main Control  
Module  
Front  
Power Supply  
Module  
Figure 3-2: MGC-100 Components  
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Figure 3-3 describes the functional block diagram of the complete MGC-50.  
Backplane  
Rear  
MUSIC I/O  
H.323 I/O  
NET I/O  
Main Control  
Module  
Front  
Power Supply  
Module  
Figure 3-3: MGC-50 components  
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Chapter 3 - System Architecture  
Figure 3-4 shows the physical layout of the MGC-100 and how it interfaces  
with the outside world.  
Operator  
Workstation  
RS232  
RS232  
Ethernet  
ATM  
Network  
Hard  
Disk  
Comm.  
Controller  
LAN  
Interface  
Serial  
Inteface  
Main  
CPU  
Main  
C
8
M
Control  
Module  
CPU Bus  
Control Bus  
Functional  
ISDN  
H323  
Network  
Interface Interface Interface  
ATM  
Network  
MPI  
Network  
Audio  
Module  
Video  
Module  
MUX  
Module  
Data  
Module  
Modules  
Network  
Interface  
H323  
Network  
Information Highway  
ISDN  
Network  
MPI  
Box  
DCE  
Figure 3-4: MGC unit functional block diagram  
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Figure 3-5 shows the physical layout of the MGC-100 and how it interfaces  
with the outside world.  
H323  
Network  
ISDN  
Network  
ATM  
Network  
CSU/PABX  
Workstations  
RS232  
120/230 V  
LAN  
Alarms  
Workstations  
RS232  
MGC-100  
I/O  
Card  
I/O  
I/O  
Ethernet  
Card  
Card  
Floppy Disk  
Hard Disk  
Comm.  
Controller  
Main  
CPU  
LAN  
Interface  
Serial  
Interface  
Main  
Control  
Module  
CPU Bus  
Power Bus  
Serial  
equipment  
Communication Bus  
Information  
Functional  
Modules  
ISDN  
Network  
Interface  
MPI  
Network  
Interface Interface Interface  
H323  
Network  
ATM  
Network  
Audio  
Module  
Video  
Module  
MUX  
Module  
Data  
Module  
Fan  
Module  
MPI  
Box  
Power  
Module  
Power  
Module  
Power  
Module  
Power  
Supply  
Unit  
Power Plane  
Figure 3-5: MGC-100 functional block diagram  
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Chapter 3 - System Architecture  
Figure 3-6 shows the physical layout of the MGC-50 and how it interfaces  
with the outside world.  
H323  
ISDN  
ATM  
Network  
Network  
Network  
CSU/PABX  
Workstations  
RS232  
120/230 V  
LAN  
Alarms  
Workstations  
RS232  
MGC-100  
I/O  
I/O  
I/O  
Ethernet  
Card  
Card  
Card  
Floppy Disk  
Hard Disk  
LAN  
Interface  
Serial  
Interface  
Comm.  
Controller  
Main  
CPU  
CPU Bus  
Power Bus  
Serial  
equipment  
Communication Bus  
Information  
ISDN  
Network  
Interface  
MPI  
Network  
Interface  
H323  
Network  
ATM  
Network  
Interface Interface  
Audio  
Module  
Video  
Module  
MUX  
Module  
Data  
Module  
Fan  
Module  
MPI  
Box  
Power  
Module  
Power  
Module  
Power  
Module  
Power  
Supply  
Unit  
Power Plane  
Figure 3-6: MGC-50 functional block diagram  
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Information Flow  
Figure 3-7 shows the flow of information within the system.  
The MUX Module is not used with the H.323.  
H323  
I/O Card  
I/O Card  
ATM  
MPI  
H.323 Network  
Interface  
Module  
(includes MUX)  
ISDN/ATM/MPI  
Network  
Interface  
Module  
Main  
Control  
Module  
MUX  
Module  
Data  
Module  
Audio  
Module  
Video  
Module  
Figure 3-7: Signal flow process  
Information enters the MGC units from the telecommunications network via a  
PBX or CSU, and into the Network Interface Module. The information is then  
transferred to the MUX Module via the Internet.  
The MUX Module transfers the control information to the Main Control  
Module via the Control Bus. The control information is then processed by the  
Main Control Module and a control response forwarded via the Control Bus  
to the appropriate MUX Ports.  
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Chapter 3 - System Architecture  
The MUX module divides the incoming information into audio, video and  
data components, and then forwards the information to the appropriate  
functional module. The information arriving at the MUX ports is multiplexed  
into Nx56/64 Kbps channels. These channels can be hyperchannels or  
aggregated channels, depending on the capabilities of the network and the  
receiving terminals.  
The MUX Module transfers audio information to the Audio Module via the  
Information Highway. The audio information is then processed by the Audio  
Module and forwarded via the Information Highway to the appropriate MUX  
ports.  
The MUX Module transfers video information to the Video Module via the  
Information Highway. There are two modes of video operation during a  
conference:  
•
Video Switching, where the speaker is the only person shown on the  
screen. The MUX module broadcasts the video of the current speaker to  
all sites involved in the conference.  
•
Continuous Presence, where several participants are shown on the  
screen. The video information is processed by the Video Module and  
forwarded via the Information Highway to the appropriate MUX Ports.  
The MUX Module transfers T.120 data (which follows the ITU-T T.120  
standard for data transfer and application sharing in a multipoint conference)  
to the Data Module via the Information Highway. The data information is  
processed by the Data Module and forwarded to the appropriate MUX Ports.  
After the audio, video, and data information has been processed, the  
processed information flows back to the MUX module for multiplexing, after  
which it is sent to the network via the Network Interface module and the  
Input/Output card. This information is then transferred to the Network  
Interface module via the Information Highway. The information is then ready  
for transmission.  
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MGC Manager Interface  
As shown in Figure 3-4, “MGC unit functional block diagram” on page 3-4,  
the Main Control Unit communicates with the MGC Manager through the  
LAN interface or the RS-232 interface.  
Power Supply Flow  
For the MGC-100, the AC power inlet is connected by a switch through a 15  
Amp. circuit breaker and then filtered to the AC power supply module. The  
DC power outlet delivers 5V, 12V, and -12V through the power bus in the  
Backplane to the functional units and the Main Control Module. The 12V is  
also delivered to the fans.  
For the MGC-50, the AC power inlet is connected through a 12.5 amp. 250  
volt fuse and then filtered to the AC power supply module.  
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Chapter 3 - System Architecture  
3-10  
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4
Hardware Description  
This chapter describes the various components that make up the MGC unit.  
The following components are described:  
•
•
•
•
•
Backplane  
Main Control Module  
Power Supply Module  
Fans  
Functional Modules  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
ISDN Net-T1/Net-E1  
ISDN/T1-CAS Net-2/4/8  
ATM-25/155  
MG323  
IP24  
IP48  
IP+12, IP+24, IP+48  
MPI-4/8  
MUX  
MUX+  
Standard Audio  
Audio+8A/V  
Audio+12/24, Audio+24/48, Audio+48/96  
Standard Video  
Video+  
Data  
•
•
Input/Output cards  
Greet&Guide hardware kit  
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Chapter 4 - Hardware Description  
MGC-100 Components Location  
Figure 4-1 shows the front panel of the MGC-100. The front panel provides  
access to the Main Control Module, the Functional Modules, and the Power  
Supply Modules. Status LEDs on the Main Control Module, Functional  
Modules, and Power Supply Modules indicate the status of the system.  
Functional Modules  
Ejectors  
Main  
Control  
Module  
LEDs  
CONT  
NET-E1  
MUX  
MUX  
DATA  
DATA  
VIDEO  
VIDEO  
VIDEO  
VIDEO  
AUDIO  
AUDIO  
AUDIO  
AUDIO  
NET-8  
NET-8  
NET-8  
Critical  
Major  
Minor  
L0  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
MGC-100  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Line  
Line  
Line  
Line  
Line  
Line  
Line  
Line  
1
2
3
4
5
6
7
8
Line  
Line  
Line  
Line  
Line  
Line  
Line  
Line  
1
2
3
4
5
6
7
8
Line  
Line  
Line  
Line  
Line  
Line  
Line  
Line  
1
2
3
4
5
6
7
8
Power  
L1  
Line  
Line  
A
B
L2  
L3  
PWR  
PWR  
PWR  
IN OUT  
IN OUT  
IN OUT  
Floppy Disk Drive  
COM Port  
Figure 4-1: MGC-100 front panel  
Power Supply Module Handle  
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Figure 4-2 shows the rear panel of the MGC-100. The rear panel provides  
access to the network I/O card connectors. I/O cards are inserted via the rear  
panel. In addition, the rear panel houses the main power switch, AC inlet,  
fans, the circuit breaker, additional communications ports and alarm ports.  
The alarms port provides dry contacts for critical, major, and minor alarms.  
Slot A  
Main Control  
Module Cover  
RS232  
Connectors  
Network  
Connectors  
MUSIC  
LINE IN  
COM  
1
ALARMS  
COM  
LAN  
10/100 Mbits  
Main Switch  
and Circuit Breaker  
AC Inlet  
Dry Contacts  
RJ45 Connector  
Fan  
Figure 4-2: MGC-100 rear panel with external connectors  
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Chapter 4 - Hardware Description  
Figure 4-3 shows the front panel of the MGC-100 NEBS Standard. The front  
panel, as in the MGC-100, provides access to the Main Control Module, the  
Functional Modules, and the Power Supply Modules. Status LEDs on the  
Main Control Module, Functional Modules, and Power Supply Modules  
indicate the status of the system.  
.
Functional Modules  
Ejectors  
Main  
Control  
Module  
LEDs  
CONT  
NET-E1  
MUX  
MUX  
DATA  
DATA  
VIDEO  
VIDEO  
VIDEO  
VIDEO  
AUDIO  
AUDIO  
AUDIO  
AUDIO  
NET-8  
NET-8  
NET-8  
Critical  
Major  
Minor  
L0  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
MGC-100  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Line  
Line  
Line  
Line  
Line  
Line  
Line  
Line  
1
2
3
4
5
6
7
8
Line  
Line  
Line  
Line  
Line  
Line  
Line  
Line  
1
2
3
4
5
6
7
8
Line  
Line  
Line  
Line  
Line  
Line  
Line  
Line  
1
2
3
4
5
6
7
8
Power  
L1  
Line A  
L2  
Line  
B
L3  
Floppy Disk Drive  
COM Port  
Power Supply Module Cover  
Figure 4-3: MGC-100 NEBS standard front panel  
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Figure 4-4 shows the rear panel of the MGC-100 NEBS Standard.  
The rear panel, as in the standard MGC-100, provides access to the  
network I/O card connectors and fans. I/O cards are inserted via the  
rear panel.  
Slot A  
Main Control  
Module Cover  
Network  
Connectors  
RS232 Connectors  
USIC  
NE IN  
COM  
1
COM  
ALARMS  
LAN  
Power Switch  
10/100 Mbits  
and Circuit Breaker  
Terminal  
Blocks  
+
Fan  
Dry Contacts  
RJ45 Connector  
Figure 4-4: MGC-100 NEBS standard rear panel with external connectors  
4-5  
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Chapter 4 - Hardware Description  
Figure 4-5 shows the top view of the inside of the MGC-100. The Main  
Control Module, Functional Modules, and I/O cards are all connected to the  
Backplane. The Power Supply Modules, located underneath the Main Control  
Module and the Functional Modules, are connected to the Powerplane.  
REAR  
Backplane  
I/O cards  
Main Control  
Module  
Function modules  
FRONT  
Figure 4-5: MGC-100 top (internal) view  
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MGC-50 Components Location  
Figure 4-6 shows the front panel of the MGC-50. The front panel provides  
access to the Main Control Module, the Functional Modules, and the Power  
Supply Module. Status LEDs on the Main Control Module, Functional  
Modules, and Power Supply Module indicate the status of the system.  
Functional Modules  
Ejectors  
Main  
Control  
Module  
LEDs  
CONT  
PRI-8  
MG-323  
AUDIO  
AUDIO  
VIDEO  
VIDEO  
VIDEO  
VIDEO  
Critical  
POLYCOM  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Major  
Minor  
L0  
MGC-50  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Line  
Line  
Line  
Line  
Line  
Line  
Line  
Line  
1
2
3
4
5
6
7
8
Power  
L1  
L2  
L3  
PWR  
OUT  
Floppy Disk Drive  
COM Port  
Figure 4-6: MGC-50 front panel  
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Figure 4-7 shows the rear panel of the MGC-50. I/O cards are inserted via the  
rear panel. The rear panel also provides access to the fans, power supply  
module, network connections, additional communications ports, the main  
power switch, AC inlet, and fuse.  
Slot A  
Main Control  
Module Cover  
IO Card  
COM 1  
LAN  
Fuse  
Main Switch  
Fan  
AC Inlet  
RJ45  
Connector  
Figure 4-7: MGC-50 rear panel with external connector  
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Figure 4-8 shows the top view of the inside of the MGC-50. The Main  
Control Module, Functional Modules, and I/O cards are all connected to the  
Backplane. The Power Supply Module is located underneath the Main  
Control Module and the Functional Modules, and is connected by wire  
leading to the backplane.  
REAR  
Backplane  
I/O Cards  
Main Control  
Module  
Function Modules  
FRONT  
Figure 4-8: MGC-50 top (inside) view  
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Chapter 4 - Hardware Description  
Main Control Module  
The Main Control Module performs the functions of conference setup,  
conference teardown, and resource allocation in both the MGC-100 and the  
MGC-50. The Main Control Module has an Intel-based Pentium processor, a  
hard disk drive and 256 MB of memory. To enable 2000 reservations, the  
MCU Main Control Module must contain at least 128 MB of memory.  
The front LED’s indicate the status if the module is in operation and  
functioning properly.  
Figure 4-9 shows a block diagram of the Main Control Module.  
Figure 4-9: Block diagram of MCM  
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The MGC unit can contain different types of IP network cards. The Main Control  
Module operating system includes drivers for all of the cards. The Main Control  
Module’s operating system automatically detects the card type. If the card is  
correctly identified, the system starts up correctly. If the system fails to detect  
any card type, it will start up according to the card type definition in the  
system.cfg file.  
The Main Control Module includes several connectors. These are connected  
to ports on the chassis. Two types of connectors on the rear panel provide  
connections from the MGC to various external systems. These systems  
include reservation systems, local or remote operator consoles, management  
systems and billing systems. One connector is a standard Ethernet LAN  
interface, which support operator workstations operating on LANs via TCP/  
IP. The other connector is an RS-232 interface, which is used for local  
diagnostics and production purposes.  
An RS-232 interface connector on the front panel is provided for connecting  
to operator workstations locally or remotely (via a modem). The connector is  
used for local diagnostics and production purposes.  
The Main Control Module Control Bus connects to the Functional Modules.  
The C8M provides the interface between the Main Control Module and the  
Backplane. This module also generates the MCU clock. The operating system  
running on the Main Control Module uses the Processor’s internal clock  
interrupts to set up its real-time clock. Sometimes, the operating system’s  
clock may skip one or several interrupts resulting in a time difference  
between the two clocks. In such a case, the operating system compares the  
two clocks. When a discrepancy between the two clocks is detected, the  
operating system updates its clock according to the Main Control processor’s  
clock. This feature ensures that long-term reservations start on time.  
This feature does not correct any time difference between the MGC Manager’s  
clock (which is derived from the Windows operating system run on the operator  
workstation) and the MCU internal clock.  
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Chapter 4 - Hardware Description  
MGC-50/100 Control Unit with Removable Hard Drive  
As an option the Control Unit (CU) can be supplied with a removable Hard  
Drive. The Hard Drive is pre-configured for either XPEK or pSOS Operating  
Systems. This Control Unit does not include a floppy disk drive.  
•
•
MGC Manager versions 6.11 and 7.0.2 also can support the removable  
Hard drive.  
It is possible to configure several removable Hard drives for a single MCU.  
Sharing Hard Drives between two different MCU’s is not possible due to the  
different cards, network services and reservations. However, if you need to  
move a drive to another MCU contact Polycom support.  
The following sections describe the steps required to install the removable  
hard drive.  
Removing the Control Unit from the MCU  
The Control Unit is not hot swappable.  
Use the following procedure for both the MGC-100 and the MGC-50 to  
replace the Control Unit:  
1. Exit the MGC Manager application.  
2. Switch OFF the main power switch on the rear panel and disconnect the  
power cord from the power source.  
3. Remove the cover at the rear of the MCU.  
4. Disconnect the following cables from the Control Unit:  
•
The LAN (RJ-45) and Dongle (RS-232 Serial) cable connections  
5. From the front of MCU, unscrew the four screws that secure the Control  
Unit to the chassis.  
A modem may be connected to the RS-232 port on the front panel of the  
Control Unit. If present, disconnect.  
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MGC Hardware and Installation Manual  
6. Use the plastic ejectors to pull the Control Unit out of its slot.  
7. Slide the Main Control Unit out through the front panel and remove the  
Control Unit from the MCU.  
Control Unit Installation  
Installing the Control Unit on the MCU:  
1. Ensure that the MCU is OFF, and the power cord is disconnected.  
2. Slide in the new Control Unit, making sure that no internal cables block  
or are damaged in any way.  
3. Push the Control Unit firmly into the backplane slot and make sure it’s  
properly seated in its slot.  
4. Tighten the four screws that attach the Control Unit to the MCU chassis.  
5. Reconnect disconnected cables to the Control Unit.  
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6. Attach the rear panel back on the chassis.  
7. Connect the power cord to the power source and switch ON the main  
power switch on the rear panel.  
8. Open the MGC Manager application.  
9. Configure the MCU’s IP Address as specified in the First Entry IP  
Configuration section below.  
IP Configuration Change  
For more information see “IP Configuration Change on XPEK and pSOS OS”  
on page 2-35 of this manual.  
Hard Drive Operation  
The removable Hard Drive is not hot swappable. Insertion or removal of the  
Hard Drive requires MCU Shutdown.  
Turning the hard drive key when the MCU is ON can result in Hard Drive failure.  
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Inserting the Hard Drive  
1. Make sure the MCU is OFF and insert the Hard Drive into its slot.  
Check that the Hard Drive is firmly locked into place.  
2. Turn the key counter clockwise to lock the Hard Drive.  
3. Turn ON the MCU.  
The LED activates on the Hard Drive’s panel after MCU startup.  
4. In normal mode the Hard Drive 7- segment LED is set to 0  
When the LED does not display 0, contact support.  
7-segment LED  
Removable disk  
Hard Drive Key  
Figure 4-10: Removable Hard Drive Front Panel View  
Removing the Hard Drive  
1. Make sure the MCU is OFF.  
2. Insert the key into the Key Lock and turn the key clockwise to unlock the  
Hard Drive.  
3. Firmly push the Eject button.  
The Hard Drive is released from the drive’s housing.  
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Chapter 4 - Hardware Description  
4. You can now remove the Hard Drive by sliding it out from its housing.  
Hard Drive Limitations  
•
•
•
The XPEK or pSOS change function requires changing pre-configured  
Hard Drives  
IP Change can only be implemented as described in the procedure: “IP  
Configuration Change on XPEK and pSOS OS” on page 2-35  
Disk Rescue cannot be performed on a Control Unit with pSOS  
Operating System  
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Backplane  
The Backplane is based on the “universal slot” concept, where any card can  
be inserted in any slot. Therefore, different configurations are formed based  
on the users’ port capacity and functionality requirements. The Backplane  
supports hot swapping of Function Modules and I/O cards.  
In the MGC-100, the front of the Backplane contains 16 slots for Functional  
Modules and an additional slot (Slot A) for the Main Control Module. The  
back of the Backplane contains 17 slots for I/O cards (16 slots for I/O and one  
“dummy” slot). The Network Interface Modules connected via the Backplane  
to I/O cards, which connects the system to the network. The Power Supply  
Module provides power to the Backplane via a power bus.  
Backplane  
H.323 I/O  
H.323 Network I/F  
Rear  
ATM I/O  
ATM Network I/F  
NET I/O  
ISDN Network I/F  
MUX  
MUSIC I/O  
Audio  
Video  
Data  
Main Control  
Module  
Front  
Power Supply  
Module  
Figure 4-11: MGC-100 Backplane  
4-17  
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Chapter 4 - Hardware Description  
In the MGC-50, the front of the Backplane contains eight slots for Functional  
Modules and an additional slot (Slot A) for the Main Control Module. The  
back of the Backplane also contains eight slots for I/O cards and one  
“dummy” slot. The Network Interface Module is connected via the Backplane  
to I/O cards, which connect the system to the network. The Power Supply  
Module provides power to the Backplane via a power bus.  
Backplane  
MPI Serial Network I/F  
H.323 I/O  
H.323 Network I/F  
Rear  
ATM I/O  
ATM Network I/F  
NET I/O  
ISDN Network I/F  
MUX  
MUSIC I/O  
Audio  
Video  
Data  
Main Control  
Module  
Front  
Power Supply  
Module  
Figure 4-12: MGC-50 Backplane  
Control Bus  
The MGC-100 and the MGC-50 use the same Control Bus. The Control Bus  
connects the Main Control Module to the Functional Modules. The Control  
Bus is an HDLC bus. A double bus is implemented for redundancy.  
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MGC Hardware and Installation Manual  
Information Highway  
The Information Highway is a high capacity TDM-type bus. It is used by both  
the MGC-100 and the MGC-50. The Information Highway transfers  
information from the Network Interface Modules to the MUX Modules and  
from the MUX Modules to the Audio, Video and Data Modules except during  
IP calls. In IP calls (H.323 and SIP) the information is transferred directly to  
the IP network module and from there to the Audio, Video and Data modules.  
Powerplane  
The MGC-100, as opposed to the MGC-50, uses a Powerplane. Up to three  
Power Supply Modules can be plugged into the Powerplane. The Powerplane  
and Power Supply Modules are designed to accommodate hot swapping of  
power supplies.  
In the MGC-50, there is one power supply, which is connected to the backplane  
and fans via wire leads.  
4-19  
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Chapter 4 - Hardware Description  
Power Supply Module  
Both MGC units (MGC-100 and MGC-50) operate at 100-240 volts  
AC 50/60 Hz.  
Power Module in the MGC-100  
Up to three redundant power supplies (N+1) provide backup for the system to  
ensure multipoint service is not interrupted as a result of any single power  
supply failure. The Power Supply Modules are hot swappable and connect to  
the Powerplane, which is part of the Backplane.  
The power supply automatically senses the AC input voltage.  
One Power Supply Module is required to power a partially populated system.  
Two Power Supply Modules are required to power a full system or a partially  
populated system with power supply redundancy.  
Three Power Supply Modules are required to power a full system with power  
supply redundancy.  
The capacity of each power supply module is shown in Table 4-1.  
Table 4-1: MGC-100 Power supply modules capacity  
Voltage (V)  
Maximum current (Amp.)  
5
90  
5
12  
-12  
1
The MGC-100 can accommodate a -48 volt DC power supply. The  
mechanical design does not allow 48V power supply modules to be inserted  
into a system designed for AC input, or AC power supply modules to be  
inserted into a system designed for 48V DC input.  
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MGC Hardware and Installation Manual  
Power Module in the MGC-50  
In the MGC-50, the Power Supply Module is not hot swappable. The power  
supply automatically senses the AC input voltage.  
The capacities of the power supply module are shown in Table 4-2, “MGC-50  
Power supply module capacity”.  
Table 4-2: MGC-50 Power supply module capacity  
Voltage (V)  
Maximum current (Amp.)  
5
120  
2
12  
-12  
.5  
Power Supply Cord  
The MGC-100 and the MGC-50 may only use power supply cords supplied  
by Polycom Inc.or a equivalent UL approved cable, rated at a current of up to  
15 Amp., depending on country standards, for AC power supply. The  
following specifications are for both the MGC-100 and MGC-50.  
For the DC power supply in the MGC-100, use the AWG 10 three wires  
cabling. The following color scheme is used in the connection:  
•
•
•
Black for “-48VDC”  
Red for “RETURN -48VDC”  
Green or yellow-green for “Protective Ground’  
4-21  
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Chapter 4 - Hardware Description  
Fuse/Circuit Breaker (AC Power)  
Currently, MGC-100 Control Units come equipped with a circuit breaker.  
Previous models on the MGC-100 use one UL approved circuit breaker. The  
specifications of the fuse are shown in Table 4-3.  
The MGC-50 uses one UL approved fuse, Schurter Type no. 0001.1015. The  
specifications of the fuse is also shown in Table 4-3.  
Table 4-3: Fuse specifications  
Previous MGC-100  
Control Units without  
circuit breakers  
MGC-50 Specifications  
Voltage (V)  
Size  
5 * 20mm  
5 * 20 mm  
Type  
Rating  
Quick acting - F  
10A, 250V  
Quick acting - F  
12.5A, 250V  
Fans  
Three fans are mounted at the bottom of the rear panel on the MGC-100. Each  
fan has an alarm, which is monitored by that Main Control Module. The  
system generates an alert upon failure.  
Two fans are mounted at the bottom of the rear panel on the MGC-50.  
Alarms Port  
In the MGC-100, the main control module includes an Alarms port. The dry  
contacts on the rear panel of the MGC-100 are for connecting to the  
customer’s alarms system. The Alarms port has the following specifications:  
Voltage rating: 60 V DC maximum  
Current rating: 0.2 A maximum  
For the MGC-50, no Alarms ports are in use.  
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MGC Hardware and Installation Manual  
Functional Modules  
The Functional Modules (cards) perform the various audio, video, and data  
processing functions for the MGC unit. Both the MGC-100 and the MGC-50  
use the same functional modules.  
The MGC-100 unit houses up to sixteen Functional Modules, which can  
occupy slots 1 through 16.  
The MGC-50 unit houses up to eight Functional Modules, which can occupy  
slots 1 through 8.  
The LED’s on the front of each Functional Module indicate the status of  
operation and whether it is functioning properly. Functional Modules are  
installed via the front panel of the MGC unit. A connector at the rear of each  
function al module connects the module to the backplane. Any module can be  
inserted into any slot. All Functional Modules are front-removable and hot  
swappable.  
Table 4-4 lists the available Functional Modules.  
Table 4-4: MGC Functional Modules Description  
Functional Module  
Function  
Port capacity  
Interfaces between the MGC  
unit and the ISDN network.  
46 channels/60  
channels  
Net-T1/Net-E1 ISDN  
Network Interface  
Net-2 ISDN/T1-CAS  
Network Interface  
Interfaces between the MGC  
unit and the ISDN network or  
T1-CAS lines.  
46 channels/60 ISDN  
channels or 48 T1-CAS  
channels  
Net-4 ISDN//T1-CAS Interfaces between the MGC  
92 channels/120 ISDN  
channels or 96 T1-CAS  
channels  
Network Interface  
unit and the ISDN network or  
T1-CAS lines.  
Net-8 ISDN/T1-CAS  
and Net-8L ISDN  
Network Interface  
Interfaces between the MGC  
unit and the ISDN network or  
T1-CAS lines.  
184 channels/240  
ISDN channels or 192  
T1-CAS channels  
ATM-25 Network  
Interface  
Interfaces between the MGC  
unit and the ATM network.  
10 ports  
ATM-155 Network  
Interface  
Interfaces between the MGC  
unit and the ATM network.  
20 ports  
4-23  
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Chapter 4 - Hardware Description  
Table 4-4: MGC Functional Modules Description  
Functional Module  
Function  
Port capacity  
MG323  
IP24  
Audio, video and data  
communications across  
IP based (LAN) networks,  
including the Internet.  
•
•
•
12 channels at 128,  
256 and 384Kbps  
Enables Audio, video and  
data communications across  
IP based (LAN) networks,  
including the Internet.  
48 channels at  
128Kbps  
IP48  
Enables Audio, video and  
data communications across  
IP based (LAN) networks,  
including the Internet.  
96 channels at  
128Kbps  
IP+12  
Perform signaling and  
32 channels at  
128Kbps  
capabilities exchange for  
conferencing. Encrypted  
conferences with IP  
participants, SIP sessions  
and mixed component  
conferences that include SIP  
participants require IP+ cards  
IP+24  
Perform signaling and  
48 channels at  
128Kbps  
capabilities exchange for  
conferencing. Encrypted  
conferences with IP  
participants, SIP sessions  
and mixed component  
conferences that include SIP  
participants require IP+ cards  
IP+48  
Perform signaling and  
96 channels at  
128Kbps  
capabilities exchange for  
conferencing. Encrypted  
conferences with IP  
participants, SIP sessions  
and mixed component  
conferences that include SIP  
participants require IP+ cards  
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MGC Hardware and Installation Manual  
Table 4-4: MGC Functional Modules Description  
Functional Module  
Function  
Port capacity  
MPI-4  
Uses dialing protocols to  
communicate to endpoints  
using “Data Terminal  
Equipment” (DTE), or Data  
Communications Equipment  
(DCE).  
120 channels/92  
channels  
MPI-8  
Uses dialing protocols to  
communicate to endpoints  
using “Data Terminal  
Equipment” (DTE), or Data  
Communications Equipment  
(DCE).  
240 channels/184  
channels  
Audio (Standard)  
Performs audio compression,  
decompression, and  
bridging.  
•
•
12 ports per card  
(standard  
conference)  
Audio Bridge: 16  
participants, or 30  
participants (Large  
Video Switching  
conference)  
Audio+  
Performs audio compression,  
decompression  
•
Audio+8A - 24/48  
ports  
•
•
Audio+8V - 24 ports  
Audio+12/24 - 12/  
24* ports  
•
•
Audio+24/48 - 24/  
48* ports  
Audio+48/96 - 48/  
96* ports  
* video/audio  
conferences  
Video  
Performs video processing  
and Transcoding.  
•
•
Single – 6 ports  
Double – 12 ports  
Video+  
Performs video processing  
and Transcoding.  
Up to 8 participants  
4-25  
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Chapter 4 - Hardware Description  
Table 4-4: MGC Functional Modules Description  
Functional Module  
MUX Module  
Function  
Port capacity  
Multiplexes and  
Up to 16 ports  
demultiplexes audio, data,  
video, and control  
information; performs  
channel aggregation (inverse  
multiplexing).  
MUX+10  
Multiplexes and  
demultiplexes audio, data,  
video, and control  
18 channels at  
128Kbps  
information; performs  
channel aggregation,  
enables Encryption.  
MUX+20  
Multiplexes and  
demultiplexes audio, data,  
video, and control  
128 36 channels at  
128Kbps  
information; performs  
channel aggregation,  
enables Encryption.  
MUX+40  
Multiplexes and  
demultiplexes audio, data,  
video, and control  
72 channels at  
128Kbps  
information; performs  
channel aggregation,  
enables Encryption.  
Data Module  
Performs data routing and  
conference control.  
•
•
T.120 standard card  
- 12 ports  
T.120-24 card - 24  
ports  
The different types of Functional Modules are used to produce a variety of  
configurations. In the MGC-50 up to eight individual Functional Modules can  
be used to build the desired configuration. In the MGC-100, 16 modules can  
be used.  
Figure 4-12 shows the general design of the Functional Modules. The  
components that are common to all Functional Modules are shown in detail in  
the figure and are described in Table 4-5 on page 4-27.  
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MGC Hardware and Installation Manual  
Figure 4-13: General module architecture  
Table 4-5: Common functional module components  
Component  
Description  
The Card Manager processor.  
Provides the interface for the Control bus.  
Card Manager  
HDLC Interface  
Watch Dog  
Represents the Watch Dog, power control, and reset  
switch.  
Represents the RAM for processor general use and  
the flash for the card CPU’s software and module  
specific information such as serial number.  
Memory  
The Functional Modules are described in detail in the following segments.  
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Chapter 4 - Hardware Description  
Net-E1/Net-T1 ISDN Network Interface Module  
The Net-E1/Net-T1 ISDN Network Interface module provides the interface  
between the MGC unit and the ISDN network. It supports up to two PRI  
connections of the same type (E1, T1). One ISDN Network Interface module  
in each MGC unit serves as the “master clock,” which synchronizes the  
system clock to the ISDN network clock. The second module provides a  
backup clock, which is used if the master clock fails.  
Two types of Net-E1/Net-T1 ISDN Network Interface modules are available:  
•
The NET- T1 Network Interface Module supports channels at data rates  
of Nx56/64 Kbps to 1536 Kbps. The module provides channel allocation  
options as described in Table 4-6  
•
The NET- E1 Network Interface Module supports channels at data rates  
of Nx56/64 Kbps to 1920 Kbps. The module provides channel allocation  
options as described in Table 4-7.  
Table 4-6: NET-T1 channel allocation  
Line type  
Channel allocation  
Signaling supported  
23x56/64 Kbps  
multimedia channels;  
64 Kbps D-channel  
signaling  
Variety of North American  
signaling protocols  
including AT&T, 4ESS,  
5ESS and Northern  
Telecom DMS-100 and  
DMS-250  
ISDN  
Point-to-point leased  
Transmission without  
signaling  
Table 4-7: NET-E1 channel allocation  
Line type  
Channel allocation  
Signaling supported  
23x64 Kbps multimedia  
channels; 64 Kbps D-  
channel signaling  
Euro-ISDN Standard (ETSI  
NET 5)  
ISDN  
Point-to-point leased  
Transmission without  
signaling  
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MGC Hardware and Installation Manual  
TDM Interface  
ATM  
ATM Hardware  
MVIP  
ATM-MVIP Card  
ISA Interface  
Front  
Panel  
LEDs  
Watch  
Dog  
Card  
Manager  
Memory  
HDLC Interface  
Figure 4-14: Net-E1/Net-T1 ISDN Network Interface Module  
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Chapter 4 - Hardware Description  
The Net-E1/Net-T1 ISDN Network Interface Data Stream  
Figure 4-14 shows a block diagram of the network interface of the MGC unit.  
Telephone  
Network  
Lines  
RJ45  
Backplane  
Span A  
Net I/O  
ISDN  
LEDs  
Connector  
MVIPInterface  
RJ45  
Span B  
NET  
A
B
ISA Right Angle  
Board Connectors  
ISDN-PRI ISA Card  
Network Interface Module  
LEDs  
Figure 4-15: Net-E1/Net-T1 ISDN Network Interface block diagram  
The Net-E1/Net-T1 ISDN Network Interface Module is connected to the  
telephone network via the Net I/O card, which is connected to the PABX and  
then the CSU. The customer supplies the PABX and the CSU. The Net-E1/  
Net-T1 Network Interface Module includes the ISDN PRI-ISA that supports  
either ISDN-T1 or ISDN-E1.  
The ISDN data stream flows from the ISDN telecommunication network  
through the PABX > CSU > MGC RJ-45 input connector > Net I/O card >  
Backplane connectors > Network Interface Module > the ISDN PRI ISA card  
to the Backplane information bus.  
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MGC Hardware and Installation Manual  
Net-2/Net-4/Net-8/Net-8L ISDN and Net-2/Net-4/Net-8 T1-CAS  
Network Interface Module  
The Net-2/Net-4/Net-8/Net-8L ISDN Network Interface module provides the  
interface between the MGC unit and the ISDN network. The Net-2/Net-4/  
Net-8 T1-CAS Network Interface module provides the interface between the  
MGC unit and T1-CAS lines.  
The same type of card can be used to connect ISDN lines or T1-CAS lines.  
However, you cannot connect ISDN lines and T1-CAS lines to the same network  
card.  
The Net-2/Net-4/Net-8 card connects to the IO-2, IO-4, and IO-8 cards  
respectively. The IO-8 card contains connections of up to eight PRI spans, of  
either an E1 or T1 line and it can work with both types simultaneously. When  
the Net-2/Net-4/Net-8 card is used for T1-CAS lines, only T1 spans are  
connected to the IO card.  
Different types of ISDN and T1-CAS Network Interface Modules can be  
installed. For more details, see “MGC Functional Modules Description” on  
page 4-23.  
The module’s front panel includes two, four or eight tri-color LEDs  
(depending on the card’s configuration). Depending on the states of the LEDs  
inputs, the LED can be off, green, red or yellow. The red and yellow states  
indicate alarms.  
NET-8  
NET-2  
NET-4  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Active  
Active  
Active  
Line 1  
Line 2  
Line 3  
Line 4  
Line 5  
Line 6  
Line 7  
Line 8  
Line 1  
Line 2  
Line 3  
Line 4  
Line 1  
Line 2  
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Chapter 4 - Hardware Description  
TDM Interface  
TDM I/F  
PHYI/F  
FRAMER  
Front  
Panel  
LEDs  
COM  
Processor  
Card  
Manager  
DPR  
Watch  
Dog  
HDLC Interface  
Figure 4-16: Net-2/Net-4/Net-8 ISDN/T1-CAS and Net-8L ISDN Network Interface  
Module  
4-32  
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MGC Hardware and Installation Manual  
The Net-2/Net-4/Net-8 ISDN/T1-CAS Network Interface Data Stream  
Figure 4-16 shows a block diagram of the Net-2/Net-4/Net-8/Net-8L network  
interface of the MGC unit.  
RJ45  
Span A  
ISDN  
RJ45  
Span B  
Telephone  
Network  
Lines  
Backplane  
IO-2  
IO-4  
NET  
A
B
IO-8  
IO-4  
IO-2  
Figure 4-17: Net-2/Net-4/Net-8 ISDN/T1-CAS and Net-8L ISDN Network Interface  
Block Diagram  
The ISDN Network Interface Module is connected to the telephone network  
via the IO card (IO-2, IO-4 or IO-8), which is connected to the PABX and  
CSU. The customer is responsible for supplying the PABX and CSU.  
The ISDN data stream flows from the ISDN telecommunication network  
through the PABX > CSU > MGC RJ-45 input connector > IO card (IO-2, IO-  
4 or IO-8) > Backplane connectors > Network Interface Module to the  
Backplane information bus.  
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Chapter 4 - Hardware Description  
ATM Network Interface Module  
The ATM Network Interface Module provides the interface between the  
MGC unit and ATM network. The ATM card may be shipped in two  
configurations: ATM-25 Network Interface Module that supports one 25MB  
connection using RJ-45 connector and ATM-155 Network Interface Module  
that supports one 155MB connection using a fiber optics connector.  
The ATM-25 (FVC) Network Interface Module supports up to 10 H.321  
endpoints at 2B or 384 Kbps, using First Virtual (FVC) technology.  
The ATM-155 (FVC) Network Interface Module supports up to 20 H.321  
endpoints at 2B or 384 Kbps, using First Virtual (FVC) technology.  
The ATM-25 Network Interface Module is used with the IO-25 card and the  
ATM-155 Network Interface Module is used with the IO-155 card.  
Figure 4-17 shows the architecture for the ATM Network Interface Module.  
The card architecture is identical to both card types.  
TDM Interface  
ATM  
ATM Hardware  
MVIP  
ATM-MVIP Card  
ISA Interface  
Front  
Panel  
LEDs  
Watch  
Dog  
Card  
Manager  
Memory  
HDLC Interface  
Figure 4-18: ATM-25 and ATM-155 Network Interface Module  
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MGC Hardware and Installation Manual  
IP and IP+ Network Interface Module  
The IP and IP+ Network Interface Modules support participant connections  
using H.323 communication standards. The IP+ Network Interface Module  
also supports SIP participants.  
H.323 is a standard for audio, video and data communications across IP based  
(LAN) networks, including the Internet. H.323 allows endpoints to use  
multimedia applications without changing the network infrastructure. H.323  
also allows device independent communications between different endpoints.  
Conference participants therefore do not have to worry about devices and  
compatibility.  
Session Initiation Protocol (SIP) is an application layer protocol designed to  
work over IP networks. SIP can establish, modify, and terminate multimedia  
sessions (conferences).  
The IP and IP+ modules provide bandwidth management, that ensures that  
corporate networks will not be clogged and critical data cannot be disrupted.  
Network managers can limit the number of simultaneous IP connections  
within their network or the amount of bandwidth available to IP applications.  
The IP and IP+ Network Interface modules combine two very different  
functions in one board. This interface module is primarily an IP network card,  
using H.323 standards for video conferencing, with an added MUX capability  
that uses H.320 standards. The IP module design includes an Ethernet  
network interface and a heavy processing core to handle data.  
An MCU with IP only configuration requires the IP Network interface  
module and Audio/Video/Data cards for conferencing. In that case, the IP  
module performs the MUX functionality.  
A more powerful MCU configuration combines the two network interface  
cards to form a gateway. In this configuration, an IP endpoint can participate  
in the same conference as an H.320 endpoint.  
The IP and IP+ modules also contain an embedded software module that  
interfaces between the MCU and the external Gatekeeper.  
The different types of IP cards include standard IP and MG323 cards and IP+  
cards. The standard IP cards are available in MG323 (IP12), IP24 and IP48  
port sub-assemblies.  
4-35  
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Chapter 4 - Hardware Description  
The IP+ cards are available in IP+12, IP+24 and IP+48 port sub-assemblies.  
The following table lists the type of IP card, its version number, its  
compatibility with SIP, VoIP and Encrypted conferences and its capacity.  
Table 4-1: IP Card Types  
IP Card  
Name  
HW Version  
SIP  
Number  
VOIP  
Call  
Encryption  
Support of Units  
Capacity  
MG323  
IP24  
–
–
+
3
3
3
12  
24  
96  
No  
No  
1.24/1.41  
2.21  
IP48  
4.23 4.41  
IP+12  
IP+24  
IP+48  
+
+
+
1
2
3
32  
64  
96  
4.41  
4.41  
4.41  
The IP cards with 8 MB memory and 12 port capacity are available from  
Hardware version 1.24/1.41 and higher.  
The IP cards with 16 MB memory and 24 port capacity are available with  
Hardware version 2.21 and higher.  
IP+ cards are available with version 4.23 and higher.  
Conferences that include SIP defined participants require IP+ cards from  
version.  
Module Port Capacity  
The number of participants in a conference is limited by the Line Rates and  
conference type. Table 4-2 describes the port capacities of the cards using  
different line rates.  
Participants connecting through an IP48 card using a line rate of T.120, can  
participate in Software Continuous Presence conferences.  
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MGC Hardware and Installation Manual  
Table 4-2: IP Participant Types and Line Rate Capacities  
Line Rate  
Participant  
Type  
Card Type  
128  
Kbps  
384  
Kbps  
512  
Kbps  
768  
Kbps  
E1/T1  
MG323/IP12  
Standard Video  
participant  
12  
12  
6
6
3
T.120 participant  
6
6
6
6
6
6
6
3
SWCP  
NA  
12  
participant  
IP24  
Standard Video  
participant  
48  
24  
12  
12  
6
T.120 participant  
6
6
6
6
6
6
SWCP  
NA  
24  
12  
12  
participant  
IP48  
Standard Video  
participant  
96  
48  
48  
24  
12  
T.120 participant  
24  
24  
48  
24  
48  
24  
24  
12  
12  
SWCP  
NA  
participant  
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Chapter 4 - Hardware Description  
IP and IP+ Network Interface Module Architecture  
The IP and IP+ Network Interface Modules have the same general card  
structure as other MGC modules: Card-Manager, TDM interface, and the  
functional units.  
Figure 4-18 shows the architecture for the IP and IP+ Network Interface  
Modules.  
TDM Interface  
RTP  
Memory  
System  
controller  
CPU  
FPGA  
UART  
System  
controller  
CPU  
FLASH  
LEDs  
Stack Controller  
Memory  
UART  
FLASH  
LEDs  
10/100  
LAN Controller  
x3  
Front Panel  
LEDs  
Card  
Manager  
Memory  
Watch  
Dog  
HDLC Interface  
I/O  
Figure 4-19: IP and IP+ Network Interface Module architecture  
The IP and IP+ modules are accompanied with a LAN-I/O card. The LAN  
Ethernet 10/100BaseT is connected via the I/O card at the back of the MCU.  
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MGC Hardware and Installation Manual  
IP+ Port Capacities  
The number of participants in a conference is limited by the Line Rates and  
conference type. Table 4 describes the port capacities of the cards using  
different line rates.  
Table 4-1: IP+ Port Capacities  
Number of Participants  
IP+24  
Line  
Rate  
IP+12  
IP+48  
(Kbps)  
Non-  
encrypted  
Non-  
Non-  
encrypted  
Encrypted  
Encrypted  
encrypted  
Encrypted  
128  
32  
16  
64  
32  
96  
48  
256  
32  
16  
12  
8
12  
8
64  
32  
24  
16  
8
24  
16  
12  
8
96  
48  
36  
24  
12  
36  
24  
18  
12  
6
384  
512  
6
768  
4
T1/E1  
4
2
4
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Chapter 4 - Hardware Description  
The MPI-8 Network Interface Module  
MPI is an acronym for the Multi Protocol Interface card. The MPI-8 is a serial  
communications interface card that uses certain protocols to communicate to  
endpoints, “Data Terminal Equipment” (DTE), or “Data Communications  
Equipment” (DCE). The protocols that it uses are RS-449, RS-530, V.35, and  
RS-366, which is a dialing protocol.  
The MPI-8 Network Interface Module is connected to the DCE (supplied by  
the customer) via the MPI box. The front panel of the MPI-8 network  
interface contains two 160-pin connectors.  
MPI  
Stby  
Fail  
Active  
Connection to the  
160-pin connector on  
the front panel of the  
MPI box  
Connection to the  
160-pin connector on  
the front panel of the  
MPI box  
Figure 4-20: MPI-8 Network Interface Module front panel  
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Each 160-pin connector can be connected to one 160-pin connector located  
on the front panel of the MPI box.  
160-pin connector  
Converts data from four ports  
PORTS  
1-4  
A
B
A
B
PORTS  
9-12  
PORTS  
5-8  
PORTS  
13-16  
160-pin connector  
Converts data from four ports  
Figure 4-21: MPI box front panel  
Each of the 160-pin connectors on the MPI box interfaces to four serial ports  
found on the back of the MPI box. Therefore, each MPI-8 Network Interface  
module can be connected to up to eight ports. Each port has two connectors:  
37-pin connector and the 25-pin connector. The 25-pin connector is used to  
dial to an endpoint over an ISDN switch. (In leased line connection this port  
is not used.) The 37-pin connector connects to the serial cable coming from  
the DCE.  
RS-449 37 pin  
D-type  
connector  
RS-336 25 pin  
D-type  
connector  
Single port  
connection  
P12  
P13  
P14  
P1  
P7  
P8  
P9  
P2  
P3  
P1  
P2  
P3  
P6  
P11  
P12  
P13  
P14  
P7  
P8  
P4  
P4  
P5  
P9  
P15  
P16  
P10  
P5  
P6  
P15  
P10  
P11  
P16  
Figure 4-22: MPI box rear panel  
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Chapter 4 - Hardware Description  
MPI-8 Network Interface Data Stream  
When the MCU is set as a DTE  
The ISDN data stream flows from the ISDN telecommunication network  
through the DCE to the serial port (37-pin connector) on the MPI box. The  
data is then directed from the 37-PIN connector to the 160-PIN connector,  
which gathers data from four different ports, and channels the data stream to  
the 160-pin connector located on the MPI-8 front panel. The data is then  
converted from serial format to TDM format and flown to the Backplane  
information bus.  
The master and the Backup clock must be set on spans of the same network  
type.  
Since this is full duplex communication, the data is also flowing in the  
opposite direction. Figure 4-22 shows the data flow on an ISDN data stream.  
MPI Box  
DCE  
Serial  
connection  
37-PIN  
connector  
160-PIN  
connector  
To the 160-PIN connector  
on the MPI-8 module  
37-PIN connector  
T1 ISDN line  
(23 channels)  
37-PIN  
connector  
37-PIN  
connector  
Serial  
connection  
Figure 4-23: MPI Data Flow when MCU is DTE  
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MGC Hardware and Installation Manual  
When the MCU is set as a DCE  
The serial data stream flows from the endpoint (DTE) through the serial  
connector entering the MPI box by way of the 37-pin connector. The data is  
then directed from the 37-pin connector to the 160-pin connector connected to  
the MCU (DCE). In the MCU the data stream is converted to a TDM format,  
and then sent to the backplane information bus. Since this is a full duplex  
communication, the data is also bi-directional.  
The network clock is enabled only when the span coming from the DCE to the  
MCU is active (i.e. handles a call). Therefore, the spans defined as Primary and  
Backup clock must be connected first when starting a conference and  
disconnected last when terminating the conference.  
Figure 4-24, “MPI Data Flow when MCU is DCE” shows the data flow on a  
serial connection - the endpoints are connected directly to the MPI Box.  
MCU (DCE)  
MPI Box  
37- Pin  
Connector  
Endpoint (DTE)  
Serial  
Connection  
37- Pin  
Connector  
Serial  
Connection  
160-Pin Cable  
Endpoint (DTE)  
37-Pin  
Connector  
Serial  
Connection  
37- Pin  
Endpoint (DTE)  
Connector  
Serial  
Connection  
Endpoint (DTE)  
Figure 4-24: MPI Data Flow when MCU is DCE  
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Chapter 4 - Hardware Description  
MPI Network Interface Module Architecture  
Figure 4-25, “MPI-8 Network Interface module architecture” shows the  
architecture for the MPI-8 Network Interface Module.  
TDM Interface  
Bit Rate I/F #1  
Bit Rate I/F #2  
PHYI/F  
PHYI/F  
TDM I/F  
Front  
Panel  
LEDs  
Watch  
Dog  
Card  
Manager  
HDLC Interface  
Figure 4-25: MPI-8 Network Interface module architecture  
MUX Module  
The MUX Module multiplexes and demultiplexes the audio, video, data, and  
control information. Information arrives at the MUX Port in Nx56/64 Kbps  
channels formatted according to the ITU-T H.221 standard for framing  
(“Frame Structure for a 64 Kbps to 1920 Kbps Channel in Audiovisual  
Teleservices”).  
H.323 video conferences do not require a MUX card. The H.323 card has a  
build in MUX functionality.  
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The MUX Module receives information in one of the following standard  
formats:  
•
•
Hyper-channel (or multi-rate ISDN)  
Aggregated channel using the BONDING Mode 1 standard from 2  
channels of 56/64 Kbps to 30 channels of 56/64 Kbps  
•
Aggregated channel using the ITU-T H.221 standard for channels with  
data rates of up to 6x56/64 Kbps  
The MUX Module supports up to 16 MUX ports. Each MUX port supports  
one site.  
The MUX Module supports:  
•
•
•
Up to 16 ports at low data rates of 128-384 Kbps  
Up to 8 ports at medium data rates of up to 768 Kbps  
Up to 4 ports at high data rates of up to 1536/1920 Kbps  
For operating each terminal at its maximum data rate capacity, the MUX  
Module supports mixed rate ports. For example, some ports in a given module  
can operate at 128 Kbps while, simultaneously other ports can operate at 768  
Kbps.  
The MUX module is used in the Greet and Guide mode to store the video  
slide, which is displayed to the participants waiting in the Welcome or On  
Hold queues.  
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MUX Module Architecture  
Figure 4-25 shows the card architecture of the MUX Module.  
TDM Interface  
MUX  
MUX Hardware  
FPGA  
LEDs  
PAL  
MUX  
Processor  
SRAM  
FLASH  
DPR  
x 4  
Front  
Panel  
LEDs  
Card  
Manager  
Watch  
Dog  
Memory  
HDLC Interface  
Figure 4-26: MUX Module  
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MGC Hardware and Installation Manual  
MUX+ Module  
The MUX+ card performs multiplexing and demultiplexing of audio, video,  
data and control information. The MUX+ card has the same general card  
architecture as the MUX card and it includes the same number of processors.  
The MUX+ card capabilities include:  
•
Higher capacity  
•
•
Flexible port allocation  
Supports conference encryption  
Encryption requires the MUX+ card.  
TDM Interface  
RTP  
FPGA  
System  
controller  
MUX+  
Processor  
10/100  
Memory  
LAN Controller  
UART  
FLASH  
LEDs  
x4  
Front Panel  
LEDs  
Card  
Manager  
Memory  
Watch  
Dog  
HDLC Interface  
I/O  
Figure 4-27: MUX+ 40 Module Card Architecture  
Three types of MUX+ cards are available:  
•
•
•
MUX+10 with one processor  
MUX+20 with two processors  
MUX+40 with four processors  
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Chapter 4 - Hardware Description  
The MUX+ card can be installed together with a MUX card in the same  
MCU. A conference can run on multiple MUX+ cards, and on both MUX and  
MUX+ cards simultaneously (with non-encrypted participants).  
The MUX+ handles a variety of Line Rates, aggregation calls (1B to 6B) and  
Bonding calls (128 Kbps to E1).  
MUX+ Card Properties  
A flexible port resource allocation mechanism is available with the MUX+  
card and allocates ports dynamically thereby decreasing fragmentation. It  
enables the MCU to allocate and free resources according to the conference  
requirements without pre-configuring the Line Rate on each card unit.  
Figure 4-28: MUX+ Card Participant Properties  
When version 7.0 software is installed on the MCU, during system re-start the  
MUX+ is recognized as a new type of card and no configuration is required.  
The Card Settings dialog box definitions - Common Parameters and MUX  
Plus Parameters properties are identical to the MUX card properties.  
For more information see the MGC Administrator’s Guide, Chapter 4,  
Viewing the MUX Module Specific Properties.  
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IVR/Greet & Guide Welcome Slide  
Up to four video slides can be stored on the MUX+ card, in the same way that  
they are stored on the MUX card. In a mixed system with MUX and MUX+  
cards, the Welcome slide is downloaded to all MUX/MUX+ cards.  
MUX+ Port Capacity  
MUX+ resources are allocated at the reservation stage. MUX+ resources are  
calculated according to the relative weight assigned to the different line rates.  
Using the dynamic allocation mechanism, the MUX+ eliminates  
fragmentation and enables better utilization of resources. For example, a  
participant connecting at a line rate of E1 requires 10 times more resources  
than a participant connecting at a line rate of 128 Kbps.  
Encrypted participants always require MUX+ resources and use more  
resources than a regular participant as shown in Table 4-2, "MUX+ Cards  
Port Capacity."  
In a system with only MUX+ cards, both encrypted and non-encrypted  
participants resources are allocated and calculated according to the relative  
weight assigned to the different line rates during a reservation. For example, a  
MUX+40 card can host 72 non-encrypted or 48 encrypted participants in a  
conference using a line rate of 128 Kbps.  
In a system with both MUX and MUX+ cards, non-encrypted participants are  
assigned ports based on available MUX/MUX+ resources, the requested line  
rate and MUX card configuration. The resource report mechanism first  
allocates resources on the regular MUX card before allocating (non-  
encrypted) participants to the MUX+, thereby saving resources on the  
MUX+. In this scenario, the allocation mechanism first checks if the MUX is  
identical to the card requested line rate configuration. If it is, the system  
allocates resources on the MUX card. If not, it will reserve resources on the  
MUX+ card, to prevent fragmentation and prevent resources. For example, a  
standard MUX card configured to support a line rate of 384 Kbps, a  
participant connecting at this identical line rate is reserved on a MUX card.  
However, a participant connecting at a line rate of 128 Kbps is allocated a  
port on MUX+ card to save resources. If the MUX+ has no resources  
available, the participant is re-allocated to the standard MUX card.  
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Chapter 4 - Hardware Description  
The following table details the number of ports available with the MUX+  
cards.  
Table 4-2: MUX+ Cards Port Capacity  
Number of non-  
encrypted ports  
capacity  
Number of  
encrypted ports  
capacity  
Participant Line  
Rate  
Card type  
MUX+10  
128  
256  
384  
512  
768  
T1  
18  
16  
10  
10  
6
9
9
5
5
3
1
1
2
E1  
2
MUX+20  
128  
256  
384  
512  
768  
T1  
36  
32  
20  
20  
12  
4
18  
18  
10  
10  
6
2
E1  
4
2
MUX+40  
128  
256  
384  
512  
72  
64  
40  
40  
36  
36  
20  
20  
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MGC Hardware and Installation Manual  
Table 4-2: MUX+ Cards Port Capacity (Continued)  
Number of non-  
encrypted ports  
capacity  
Number of  
encrypted ports  
capacity  
Participant Line  
Rate  
Card type  
768  
T1  
24  
8
12  
4
E1  
8
4
MUX+ Participant Move Options  
The administrator has the option to define move behavior of encrypted  
participants by setting the system.cfg flag:  
ALLOW_ENCRYPT_IN _PARTY_LEVEL =YES/NO.  
When set to YES, participants can move:  
•
From an encrypted conference to a non-encrypted conference or another  
encrypted conference.  
•
From a non-encrypted conference to an encrypted conference or another  
non-encrypted conference.  
When the ALLOW_ENCYPT_IN_PARTY_LEVEL flag is set to NO, the  
participant’s encryption setting must match the conference encryption  
setting’s to be moved to the other conference. For example, encrypted  
participants can only move from an encrypted conference to another  
encrypted enabled conference.  
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Chapter 4 - Hardware Description  
MUX+ Resource Report  
MGC-50/100 Resource Report  
The Resources Report, displays the total number of MUX+ port resources  
available according to the card type, line rate and encryption.  
In the example shown here, the system lists the total number of ports  
available with the MUX+20 card for both non-encrypted and encrypted  
participants, based on their connection line rates. At a line rate of 128 Kbps,  
up to 36 non-encrypted and 18 encrypted participants can connect to  
conferences. At a line rate of 384 Kbps, 20 non-encrypted and 10 encrypted  
participants can connect to conferences running on the MCU.  
IP/SIP  
In the IP/SIP section of the Resources Report both non-encrypted and  
encrypted participants are grouped together.  
For example, if one encrypted and one non-encrypted participants using a line  
rate of 128 Kbps attend a conference, the resource report displays the sum of  
the used resources of both participants together. In this case the non-  
encrypted participant is allocated 1 port and the encrypted participant 2 ports,  
totalling 3 ports.  
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Audio Module (Standard)  
The Audio Module performs audio compression, decompression, and  
bridging. The Audio Module also performs transcoding between various  
audio algorithms.  
The Audio Module supports the following algorithms:  
•
•
•
ITU-T G.711 48, 56, and 64 Kbps  
ITU-T G.722 48, 56, and 64 Kbps  
ITU-T G.728 16 Kbps  
Audio Module Port Capacity  
The Audio module contains 13 units. The first unit is the Audio Bridge, which  
is the controller used for audio mixing of the participants and to identify the  
conference speaker. The remaining 12 units (2 to 13) are used to connect the  
audio channels of the participants, one unit per codec. Each codec performs  
audio coding and decoding. Each codec works with one endpoint and is  
capable of using any of the following audio algorithms: G.711, G.722, G.728,  
G.722.1 and Siren7.  
The module may contain two additional units (14 and 15). These units are  
used for Greet and Guide conferences and have to be configured in the  
“system cfg.” In such a case, port number 14 is used for music, and port  
number 15 is used for the audio message, used in Greet and Guide  
conferences.  
The Audio Bridge can run four conferences simultaneously, totaling up to 16  
participants (4/16). To increase the maximum number of participants to 30  
participants set the Audio Bridge to 1/30. If the Audio Bridge is set to 1/30 it  
can run only one conference at a time if the conference includes up to 16  
participants and not all the resources are used. The audio card can support up  
to six gateway sessions with a maximum of 12 participants. To enable the  
gateway sessions set the Audio Bridge to 6/12. When set to 6/12, the audio  
cards can run only six conferences with two participants (gateway sessions).  
The bridge can use units from the same audio card or from different cards.  
The Audio cards are set to 4x16 by default, but you can manually change the  
configuration to suit the type of conferences that are required in your site.  
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Chapter 4 - Hardware Description  
The following selections can be enabled with the Audio bridge: 1/30, 4/16,  
6/12.  
•
The total number of conferences that can be run by the MCU is:  
Number of Audio modules x 4 number of conferences selected for the  
Audio Bridge for each card. For example, if the system contains 2 audio  
modules and the Audio Bridge on one card is set to 1/30 and the Audio  
Bridge on the second card is set to 4/16, the MCU will be able to run a  
maximum of 5 conferences (1x4 + 1x1). If the Audio Bridge on both  
cards is set to 4/16, the maximum number of conferences is 8 (2 cards  
x4).  
•
•
The total number of Audio ports available is:  
No. of Audio modules x 12  
Maximum number of participants in a conference when the 1/30 option  
is selected for the Audio Bridge:  
Video Switching: 30 participants  
Continuous Presence: 12 video + 18 Audio only participants  
•
Maximum number of Gateway sessions when the Audio Bridge is set to  
6/12 is:  
No. of Audio cards x 6  
In addition, a Music I/O card is attached to the rear of the MCU of the Audio  
module. For details, see the I/O cards section, “Input/Output Cards” on  
page 4-63.  
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Audio Module Architecture  
Figure 4-26 shows the architecture for the Audio Module.  
TDM Interface  
Audio  
Audio Hardware  
Audio  
Codec  
DSP  
Message  
Card  
Audio  
Bridge  
DSP  
x 12  
DPR  
DPR  
DPR  
x 12  
Front  
Panel  
LEDs  
Card  
Manager  
Watch  
Dog  
Memory  
HDLC Interface  
Figure 4-29: Audio Module  
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Chapter 4 - Hardware Description  
Audio+ Module  
The Audio+ Module performs audio compression, decompression, and  
bridging. The Audio+ Module also performs transcoding between various  
audio algorithms.  
The Audio+ Module supports the following algorithms:  
•
•
•
•
•
•
•
•
ITU-T G.711 48, 56, and 64 Kbps  
ITU-T G.722 48, 56, and 64 Kbps  
ITU-T G.728 16 Kbps  
ITU-T G.722.1  
ITU-T G.723.1  
ITU-T G.729  
Siren7  
Siren14  
The Audio+ module enables the usage of the Interactive Voice Response  
(IVR) software component. Interactive Voice Response (IVR) for video  
enables video and VOIP conference participants to use the IVR services for  
interactive routing to conferences and to perform interactive operations from  
their endpoint using DTMF codes. It stores the voice messages used with IVR  
Services.  
The Audio+ card also enables increased port capacity in Audio Only  
conferences. Conferences can include participant handled by one card type -  
either standard audio or the Audio+ family.  
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Audio+ Module Architecture  
Audio+ represents a new family of audio cards. Audio+ has the same general  
card architecture as the audio card, but with a different number of processors.  
This has an impact on the number of ports supported by each card.  
TDM Interface  
Audio  
Audio  
Module  
32 Mbit/s  
Link  
QIFI  
FPGA  
Message  
module  
32 Mbit/s  
Links  
Audio  
Codec  
DSP  
Audio  
Controller  
Unit  
DSP  
x 7  
PCI  
BUS  
Memory  
Memory  
Memory  
Front  
Panel  
LEDs  
Card  
Manager  
LAN  
I/F  
PMC  
I/F  
Data  
Module  
PCI  
BUS  
HDLC  
I/F  
Figure 4-30: Audio+ Module  
Audio + Port Capacities  
The system’s working mode affects its system capacity: Medium Band  
(without Siren14) and Wide Band (with Siren14). The Medium and Wide  
Band settings are defined in the system.cfg file.  
For Medium Band, the flag is set to  
AUDIO_PLUS_FREQUENCYBAND_MODE=MB.  
For Wide Band, the flag is set to  
AUDIO_PLUS_FREQUENCYBAND_MODE=WB.  
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Chapter 4 - Hardware Description  
The following table details the card capacities according to the Audio  
algorithm used in the conference when the MCU is configured to Medium  
Band.  
Table 4-3: Audio+ card capacity per Audio algorithm - Medium Band setting  
Audio Algorithm  
G.711  
G.722  
G.722.1  
G.728  
G.723.1  
G.729  
Siren7  
Siren14  
Card Type  
Audio+8A  
48  
24  
24  
48  
96  
24  
24  
12  
24  
48  
24  
24  
12  
24  
48  
24  
24  
12  
24  
48  
24  
24  
12  
48  
96  
—
—
12  
48  
96  
24  
24  
12  
24  
48  
Audio+8V  
Audio+12/24  
Audio+24/48  
Audio+48/96  
The following table details the card capacities according to the Audio  
algorithm used in the conference when the MCU is configured to Wide Band.  
Table 4-4: Audio+ card capacity per Audio algorithm - Wide Band setting  
Audio Algorithm  
Card Type  
Audio+8A  
Audio+8V  
G.711  
48  
G.722  
12  
G.722.1  
12  
G.728  
12  
G.723.1  
12  
G.729  
—
Siren7  
12  
Siren14  
12  
12  
12  
12  
12  
12  
—
12  
12  
Audio+12/24 24  
Audio+24/48 48  
Audio+48/96 96  
12  
12  
12  
12  
12  
12  
12  
24  
24  
24  
48  
48  
24  
24  
48  
48  
48  
96  
96  
48  
48  
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Video Module (Standard)  
The Video Module performs video processing and Transcoding. The module  
supports the ITU-T H.261 and H.263 standards (“Video Codec for  
Audiovisual Services at Px64 Kbps”).  
The Video Module supports multiple sites. When using the Continuous  
Presence mode of operation, the Video Module combines multiple video  
sources to build a video layout image. Depending on the number of  
conference participants and the quality of the screen, the MGC supports video  
layout configurations of 2, 4, 9, 1+5 and others.  
The Video Module performs Transcoding between different compressed  
video bit rates to support multiple bit rates on the same conference. The  
module performs Transcoding from QCIF to CIF resolution to support  
multiple resolution rates in the same conference.  
Video Module Architecture  
Figure 4-29 shows the architecture for the Video Module.  
TDM Interface  
Video  
Video Hardware  
Video  
CODEC  
Memory  
x 6  
Front  
Panel  
LEDs  
Card  
Manager  
Watch  
Dog  
Memory  
HDLC Interface  
Figure 4-31: Video Module  
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Chapter 4 - Hardware Description  
The maximum transmission capability of E1 lines (up to 1920 Kbps) can be  
used in Transcoding or Continuous Presence conferences. To enable the high  
line rate transmission, a newer video card version (version 1.43 and up) must  
be installed.  
Figure 4-12 describes the various video card versions and their support of 30  
frames per second and high bit rate:  
Table 4-5: Video card 30 FPS and high bit rate support  
Video Card Version  
30 FPS Support  
High Bit Rate Support  
1.20, 1.21, 1.22, 1.23  
1.24  
—
—
—
—
1.41, 1.42  
1.43, 1.44 or higher  
If the High Bit Rate flag is set to Yes, and the MCU contains video cards of a  
version older than 1.43, the MCU status changes to Major and an appropriate  
error message is added to the Faults log. In such a case, the highest line rate  
that can be set for the conference is 768 Kbps. If the High Bit Rate flag is set  
to No, the high bit rate option is disabled and the highest conference rate is  
limited to 768 Kbps.  
Video+ Module  
The Video+ module supports up to 8 participants per module. In addition  
it provides the following features/enhancements:  
•
Click&View - A graphical console transmitted to endpoints enabling  
the users to change their personalized video layout or conference.  
•
Personal Layout - Definition and on-the-fly modification of  
individualized participant Continuous Presence layouts. For details,  
see Personal Layout  
•
Visual Effects - Definition of background colors, frame colors and  
frame widths for Continuous Presence layouts. For details, see Visual  
Effects  
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•
Quad Mode Continuous Presence - Additional Continuous Presence  
layouts suitable for large conferences, i.e. 4x4.  
•
•
•
H.263 video protocol at 30 Frames Per Second  
Improved Video Quality  
Improved Continuous Presence image quality at high bit rates  
(1.52 Mbps)  
•
•
No fragmentation - Conferences can be run across Video+ cards  
Large Continuous Presence conferences - Conference size determined  
only by overall system limitations  
•
Improved latency  
Video+ Module Architecture  
Figure 4-30 shows the Video+ module architecture.  
Figure 4-32: Video+ module architecture  
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Chapter 4 - Hardware Description  
Data Module  
The Data Module performs conference data and control routing for up to 12  
participants. The system allows for 12 conferences of one participant each, or  
one conference of 12 participants or any combination in between. In T.120  
conferences, the data module does the Transcoding. The module supports  
various ITU-T T.120 standards for data transfer and application sharing in a  
multipoint conference.  
The Data Module supports the following standards:  
•
•
•
ITU-T T.122/T.125—MCS (Multipoint Communications Service)  
ITU-T T.123—Transport Protocol Stacks  
ITU-T T.124—GCC (Generic Conference Control)  
Data Module Architecture  
Figure 4-28 shows the Data Module’s architecture.  
TDM Interface  
Data  
Data Hardware  
FPGA  
LEDs  
PAL  
Data  
Processor  
SRAM  
FLASH  
DPR  
x 4  
Front  
Panel  
LEDs  
Card  
Manager  
Watch  
Dog  
Memory  
HDLC Interface  
Figure 4-33: Data Module  
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MGC Hardware and Installation Manual  
Input/Output Cards  
Input/Output (I/O) Cards connect the Functional Modules to external systems  
and networks. The I/O Cards are housed behind the Backplane, opposite the  
Functional Modules.  
The I/O Cards, which are small and simple, are installed via the rear panel of  
the MGC. A connector at the rear of each I/O card connects the card to the  
Backplane. 0  
The following I/O cards may be installed in the MCU:  
•
The NETIO card connects two PRI/Leased connections from the MGC  
rear panel to a Net-E1/Net-T1 ISDN Network Interface Module.  
•
The IO-2 card connects two PRI/Leased connections from the MGC rear  
panel to a Net-2 ISDN/T1-CAS Network Interface Module.  
Figure 4-34: ISDN /T1-CAS Network connection for two spans  
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Chapter 4 - Hardware Description  
The IO-4 card connects four PRI/Leased connections from the MGC rear  
panel to a Net-4 ISDN/T1-CAS Network Interface Module.  
Figure 4-35: ISDN /T1-CAS Network connection for four spans  
•
The IO-8 card connects eight PRI/Leased connections from the MGC  
rear panel to a Net-8 ISDN/T1-CAS Network Interface Module.  
Figure 4-36: ISDN/T1-CAS Network connection for eight spans  
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•
The IO-25 Card connects one ATM connection from the MGC rear panel  
to an ATM-25 Network Interface Module.  
Figure 4-37: One 25MB ATM Network connection  
•
The IO-155 Card connects one ATM connection from the  
MGC rear panel to an ATM-155 Network Interface Module.  
Figure 4-38: One 155 MB fiber optics ATM Network connection  
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Chapter 4 - Hardware Description  
•
The LAN-IO Card connects one H.323 connection from the MGC rear  
panel to an H.323 Network Interface Module.  
Figure 4-39: One H.323 Network connection  
•
The Music-IO Card enables importing audio music from an external  
source such as a CD player, tape, radio, etc. It includes a Line-in jack and  
headphone output. The music is available to all endpoints.  
MUSIC  
LINE IN  
Figure 4-40: Music-IO card  
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Greet and Guide Hardware Kit  
When an Audio+ card is active on the MCU, you are not required to install the  
Greet and Guide Hardware kit. In the Audio+ card this is replaced by the IVR  
functionality (a software module).  
If you are upgrading the MCU to the Greet and Guide mode, you need to  
install the Greet and Guide hardware kit. The Greet and Guide hardware kit  
includes the following:  
•
Audio Message daughter card (not necessary if Audio+ card is  
installed) – a special daughter card, which is attached to one of the  
standard Audio Functional Modules. It stores up to eight audio messages  
(four Attended messages and four On Hold messages) that can be played  
while the participants wait in the Welcome queue or the On Hold queue.  
Only one daughter card per MCU can be installed.  
In the Audio+8 card and Audio+15 the voice messages are stored on the cards.  
The daughter card serves as a music port only.  
•
Music I/O card – an I/O card, which is attached to the rear of the  
standard Audio module, on the MCU’s rear panel. It is used to playback  
music or recorded messages from an external device such as a tape  
recorder or CD player. Only one music card per MCU may be installed.  
•
MUX – the video slides are downloaded and stored in the MUX memory.  
Up to four slides may be stored in the MUX memory – one per Message  
Service. To run Greet and Guide conferences, all MUX modules must be  
of the proper hardware version. If required, replace the existing MUX  
module by the new version MUX module. For details regarding the  
replacement of a functional module, refer to Chapter 5 of the MGC Unit  
Hardware & Installation Manual.  
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Chapter 4 - Hardware Description  
Installing the Audio Message Daughter Card on the standard Audio  
Module  
1. Unscrew the screws on the front panel of the MGC unit that secure the  
Functional Module.  
2. Unlatch the top and bottom latches by pressing up and away the top latch  
and down and away the bottom latch.  
Top latch  
AUDIO  
Stby  
Fail  
Active  
Bottom latch  
3. Use the plastic latches to pull the Functional Module out of its slot in the  
Backplane.  
4. Carefully slide the Audio Module out through the front panel.  
5. Press firmly the male connector on the Audio Message daughter card  
into the slots of the female connector on the Audio functional module  
while lining up holes A and B.  
Audio Card  
Message Extension  
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MGC Hardware and Installation Manual  
Message Card  
Male Connector  
Audio Card  
Female Connector  
a
a
b
Line Up Holes  
to Secure Cards  
b
6. Slide in the Audio module.  
7. Push the Audio module firmly into the backplane, making sure it is  
properly seated in its slot.  
8. Tighten the screws on the front panel of the MGC unit to secure the  
Audio module.  
Attaching the Music I/O Card to the Audio Module  
The Music I/O card is used to attach an external audio device such as a tape  
recorder or CD player to playback music or recorded messages to participants  
waiting in the Welcome queue during Greet and Guide conferences.  
The Music I/O card is inserted in the rear panel of the MGC unit, and it is  
attached to the Attended Audio module.  
To install the Music I/O card in the rear panel of the MGC unit:  
1. Carefully slide the Music I/O card into the slot in the backplane where  
the Attended Audio module is inserted in the front.  
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Chapter 4 - Hardware Description  
Backplane  
H.323 I/O  
ATM I/O  
H.323 Network I/F  
ATM Network I/F  
Rear  
NET I/O  
ISDN Network I/F  
MUX  
MUSIC I/O  
Audio  
Video  
Data  
Main Control  
Module  
Front  
Power Supply  
Module  
2. Tighten the screws on the rear panel of the MGC unit to secure the Music  
I/O card.  
Enabling the Audio Message Daughter Card and Music I/O Card in  
the MCU Software  
Once the Audio Message daughter card and the Music I/O card are installed,  
the system automatically identifies them. However, if you are upgrading the  
MCU by adding the Message daughter card and the Music I/O card, you may  
have to enable them in the MCU software.  
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1. Select Edit "system.cfg" from the MCU Utils sub-menu.  
The SysConfig dialog box opens.  
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Chapter 4 - Hardware Description  
2. Double-click on the GREET_AND_GUIDE line in the Section box.  
The Greet and Guide hardware items appear in the Item = Value box.  
These values are set according to the Hardware installed in the system.  
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5
System Maintenance  
The MGC is designed with ease of maintenance in mind. Most components  
are hot swappable and are accessible directly via the front panel or the rear  
panel.  
Each module includes LED indicators, which reflect the state of the module.  
The LEDs are located on the front panel of the MGC.  
All external connectors are located on the rear panel. The main power switch  
is also located on the rear panel.  
This chapter contains the following sections:  
•
•
•
A description of the controls and LED indicators  
Maintenance procedures  
Troubleshooting procedures  
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Chapter 5 - System Maintenance  
Controls and Indicators  
MGC Unit Front Panel  
The front panel of the MGC unit contains a number of controls, components,  
and indicators for using the MGC system. Figure 5-1 and Figure 5-2 show the  
front panel of the MGC-50 and MGC-100 and all their elements.  
Functional Modules  
Ejectors  
Main  
Control  
Module  
LEDs  
CONT  
NET-E1  
MUX  
MUX  
DATA  
DATA  
VIDEO  
VIDEO  
VIDEO  
VIDEO  
AUDIO  
AUDIO  
AUDIO  
AUDIO  
NET-8  
NET-8  
NET-8  
Critical  
Major  
Minor  
L0  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
MGC-100  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Line  
Line  
Line  
Line  
Line  
Line  
Line  
Line  
1
2
3
4
5
6
7
8
Line  
Line  
Line  
Line  
Line  
Line  
Line  
Line  
1
2
3
4
5
6
7
8
Line  
Line  
Line  
Line  
Line  
Line  
Line  
Line  
1
2
3
4
5
6
7
8
Power  
L1  
Line  
Line  
A
B
L2  
L3  
PWR  
PWR  
PWR  
IN OUT  
IN OUT  
IN OUT  
Floppy Disk Drive  
COM Port  
Figure 5-1: MGC-100 front panel  
Power Supply Module Handle  
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Functional Modules  
Ejectors  
Main  
Control  
Module  
LEDs  
CONT  
PRI-8  
MG-323  
AUDIO  
AUDIO  
VIDEO  
VIDEO  
VIDEO  
VIDEO  
Critical  
POLYCOM  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Stby  
Fail  
Major  
Minor  
L0  
MGC-50  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Active  
Line  
Line  
Line  
Line  
Line  
Line  
Line  
Line  
1
2
3
4
5
6
7
8
Power  
L1  
L2  
L3  
PWR  
OUT  
Floppy Disk Drive  
COM Port  
Figure 5-2: MGC-50 front panel  
LED Indicators  
The following LEDs appear on the front panel:  
•
•
8 LEDs on the Main Control Module  
3 LEDs on each Functional Module except for the Network Interface  
Module which contains additional LED for each PRI span connected to  
the system  
•
•
2 LEDs for each of the MGC-100 Power Supply modules  
1 LED on the MGC-50 Power Supply  
5-3  
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Chapter 5 - System Maintenance  
•
7 LEDs on Net-E1/Net-T1 ISDN Network Interface Module, Net-4  
ISDN Network Interface Module, ATM Network Interface Module and  
H.323 Network Interface Module  
•
•
5 LEDs on NET-2 ISDN Network Interface Module  
11 LEDs on NET-8 ISDN Network Interface Module  
The system uses these LEDs to indicate operating states. The LEDs on the  
Net-2/Net-4/Net-8 are tri-color. Depending on the states of the LEDs inputs,  
the LED can be off, green, red or yellow. The LEDs on the front panel are  
described in Table 5-1.  
Table 5-1: Front Panel LEDs  
Module  
Name  
Color  
Description  
Main Control  
Module (top  
group)  
CRITICAL  
Red  
A critical fault is detected on the  
MGC unit  
MAJOR  
MINOR  
Red  
A major fault exists on the MGC  
unit  
Yellow  
A minor fault exists on the MGC  
unit  
L0  
Green  
Green  
Reserved  
Main Control  
Module (bottom  
group)  
POWER  
Power Supply is operating  
normally.  
Only one ISDN/T1-CAS Network  
card is installed in the MCU, and  
it is configured as the Primary  
clock source. The LED is turned  
off when no ISDN Network card  
is installed.  
L1  
Green  
A second ISDN/T1-CAS  
Network module is installed and  
configured as the backup clock  
L2  
L3  
Green  
Yellow/  
orange  
LED is active when the MCU is  
restarted.  
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Table 5-1: Front Panel LEDs  
Module  
Name  
Color  
Description  
Functional  
Modules  
STBY  
Green  
On during normal operation  
(refer to Table 5-2)  
FAIL  
Red  
On when a failure has occurred  
(refer to Table 5-2)  
ACTIVE  
Yellow  
On when the module is handling  
a conference (refer to Table 5-2)  
Net-E1/Net-T1  
ISDN, ATM and  
H.323 Network  
InterfaceModule  
(additional  
LINE A  
LINE A  
LINE B  
LINE B  
Yellow  
Red  
Span A yellow alarm (RAI)  
Span A red alarm (LOS)  
Span B yellow alarm  
Span B red alarm  
Yellow  
Red  
LEDs)  
Net-2 Network  
InterfaceModule  
(additional  
LINE 1/  
LINE 2  
Off  
Span x is not in use  
Span x is OK  
Green  
Yellow  
Red  
Span x yellow alarm (RAI)  
Span x red alarm (LOS)  
LEDs)  
Net-4 Network  
InterfaceModule  
(additional  
LINE 1/  
LINE 2/  
LINE 3/  
LINE 4  
Off  
Span x is not in use  
Span x is OK  
Green  
Yellow  
Red  
Span x yellow alarm (RAI)  
Span x red alarm (LOS)  
LEDs)  
Net-8 Network  
InterfaceModule  
(additional  
LINE 1/  
LINE 2/  
LINE 3/  
LINE 4/  
LINE 5/  
LINE 6/  
LINE 7/  
LINE 8  
Off  
Span x is not in use  
Span x is OK  
Green  
Yellow  
Red  
Span x yellow alarm (RAI)  
Span x red alarm (LOS)  
LEDs)  
Power Supply  
Module  
IN/OUT  
Green  
Power-in from mains is OK. DC  
power out to backplane is OK.  
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Chapter 5 - System Maintenance  
The three Functional Module LEDs function as a group. Each state of the  
Functional Module and its associated LED array is described in Table 5-2.  
The (IDLE, ACTIVE, FAILURE, and PARTIAL FAILURE) states are the  
operational modes of the Functional Module. The (RESET, WAITING FOR  
MCMS and LOADING SOFTWARE) indicates the stages during the startup  
procedure of the Functional Module.  
Figure 5-2: Function Module LEDs  
Module State  
STBY  
ON  
FAIL  
ACTIVE  
IDLE—Ready, but not used in a  
conference  
OFF  
OFF  
ACTIVE—Used in one or more  
conferences  
ON  
OFF  
ON  
FAILURE—Error state; board is  
out of operation  
OFF  
ON  
ON  
OFF  
PARTIAL FAILURE—Error state;  
part of board is out of operation  
Flashing  
ON/OFF  
RESET—Board is in Reset state  
TEST—Power-on self test  
ON  
ON  
ON  
OFF  
OFF  
Flashing  
OFF  
WAITING FOR MCMS—Waiting  
for MCMS to start loading software  
Flashing  
Flashing  
LOADING SOFTWARE  
ON  
Flashing  
OFF  
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MGC Unit Rear Panel  
The rear panel of the MGC-100 and MGC-50 contains a number of controls  
for using the MGC unit. Figure 5-3 AND Figure 5-4 show the back panel and  
labels all elements of the MGC-50/100.  
Slot A  
Main Control  
Module Cover  
RS232  
Connectors  
Network  
Connectors  
MUSIC  
LINE IN  
COM  
1
ALARMS  
COM  
LAN  
10/100 Mbits  
Main Switch  
and Circuit Breaker  
AC Inlet  
Dry Contacts  
RJ45 Connector  
Fan  
Figure 5-3: MGC-100 rear panel controls  
The main power switch is used during installation and replacement of the  
main control unit only, since all other MGC-100 components are hot  
swappable. The switch includes an AC circuit breaker.  
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Chapter 5 - System Maintenance  
Slot A  
Main Control  
Module Cover  
IO Card  
COM 1  
LAN  
Fuse  
Main Switch  
Fan  
AC Inlet  
RJ45  
Connector  
Figure 5-4: MGC-50 rear panel controls  
The main power switch is used during installation, and replacement of fans,  
main control module and power supply since the functional modules are hot  
swappable. The switch includes an AC fuse.  
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Corrective Maintenance  
Corrective maintenance refers to changing or replacing an element of the  
system that is faulty. The MGC has several components in which problems  
may occur:  
•
•
•
Main Control Module  
Functional Modules:  
Network Interface Modules (ISDN/T1-CAS, ATM, IP and MPI and/or  
Serial)  
•
•
•
•
•
•
•
MUX and MUX+ Modules  
Audio/Audio+ Modules  
Video/Video+ Modules  
Data Modules  
I/O Cards  
Power Supply Module  
Fans  
Warning!  
•
All maintenance tasks are to be performed by qualified, authorized  
personnel.  
•
•
Use only replacement parts supplied by your dealer.  
Follow all procedures. Do not skip any steps.  
Unless specified differently, the procedures described here are the same for  
both the MGC-100 and the MGC-50.  
Before replacing parts:  
•
To ensure a part needs replacing, complete the troubleshooting  
procedures.  
•
•
•
Identify exactly which part needs replacing.  
Make sure you have the correct replacement part on hand.  
Make sure you are using proper ESD equipment, to prevent damage to  
the system.  
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Chapter 5 - System Maintenance  
Replacing a Functional Module  
The following procedure is applicable for both the MGC-100 and the MGC-  
50. All Functional Modules are hot-swappable and can be replaced with the  
system running. Use the following procedure to replace a faulty Functional  
Module:  
1. Unscrew the screws on the front panel of the MGC that secure the  
Functional Module.  
2. Use the plastic ejectors to pull the Functional Module out of its slot in the  
Backplane.  
3. Carefully slide the Functional Module out through the front panel.  
4. Slide in the replacement Functional Module.  
5. Push the Functional Module firmly into the Backplane; making sure it is  
properly seated in its slot.  
6. Tighten the screws on the front panel of the MGC that secure the  
Functional Module.  
Replacing the I/O Cards  
The following procedure is applicable for both the MGC-100 and the MGC-  
50. The I/O Cards (such as the NETIO card) are hot-swappable and can be  
replaced with the system running. Use the following procedure to replace a  
faulty I/O Card:  
1. Label then disconnect the external connections from the I/O card.  
2. Unscrew the screws on the rear panel of the MGC that secure the I/O  
Card.  
3. Pull the I/O Card out of its slot in the Backplane.  
4. Carefully slide the I/O Card out through the rear panel.  
5. Slide in the replacement I/O Card.  
6. Push the I/O Card firmly into the Backplane; making sure it is properly  
seated in its slot.  
7. Tighten the screws on the rear panel of the MGC that secure the I/O  
Card.  
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MGC Hardware and Installation Manual  
8. Referring to the labels, reconnect the external connections to the I/O  
card.  
Replacing the Fuse  
Use the following procedure for replacing the fuse in the MGC-50:  
This procedure is also relevant for earlier versions of the MGC-100. Current  
MGC-100 units are provided with a circuit breaker instead of a fuse.  
1. If the MCU is working, exit the MGC Manager application and turn off  
the MCU. Otherwise, skip this step.  
2. Switch off the power in the MGC unit.  
3. Disconnect the power cord.  
4. Release the latch of the fuse holder and slide the fuse holder out of the  
MGC unit.  
5. Pull the fuse out of the fuse holder.  
6. Insert the new fuse into the fuse holder. Use a fuse that meets the  
specifications as defined in see Chapter 4, “Fuse/Circuit Breaker (AC  
Power)” on page 4-22.  
7. Slide the fuse holder into the MGC unit and push it in firmly to engage  
its latch.  
8. Connect the power cord.  
9. Switch on the power.  
Replacing the Power Supply Modules for the MGC-100  
(including the NEBS Unit)  
The Power Supply Modules are hot swappable and can be replaced with the  
system running. Use the following procedure to replace a faulty Power  
Supply Module:  
1. Unscrew the 4 screws on the front panel of the MGC-100 that secure the  
Power Supply Module.  
5-11  
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Chapter 5 - System Maintenance  
2. Pull on the handle of the Power Supply Module to pull the module out of  
its slot in the Powerplane.  
3. Carefully slide the Power Supply Module out through the front panel.  
4. Slide in the replacement Power Supply Module.  
5. Push the Power Supply Module firmly into the Powerplane making sure  
it is properly seated in its slot.  
6. Tighten the 4 screws on the front panel of the MGC-100 that secure the  
Power Supply Module.  
Replacing the Power Supply Module for the MGC-50  
The Power Supply Module is not hot swappable and cannot be replaced with  
the system running. Use the following procedure to replace a faulty Power  
Supply Module:  
1. If the MCU is working, exit the MGC Manager application and turn off  
the MCU. Otherwise, skip this step.  
2. Unplug the MCU from the AC outlet.  
3. Using a standard Phillips screwdriver, remove six spring-loaded screws  
from the fans cover on the MCU’s rear panel.  
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MGC Hardware and Installation Manual  
4. Optional. Remove the two jack connectors from the fan panel to  
completely remove the fans from the MCU.  
5. Disconnect the AC input (J1) and the 12V/5V Sense connectors (J2).  
6. Disconnect the +5V and -5V power cables using a 9/16” (13 mm) M8 nut  
driver.  
Tighten the two flat washers; the spring washer and the nut back to their +5V  
and -5V screws on the faulty unit to be shipped to the manufacturer. These  
items are delivered with the new power supply module.  
7. Using a Phillips screwdriver, loosen the six spring-loaded screws on the  
front panel of the MGC-50 that secure the Power Supply Module.  
PWR  
OUT  
5-13  
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Chapter 5 - System Maintenance  
8. From the rear, carefully slide the Power Supply Module out through the  
front panel and remove.  
9. Slide in the replacement Power Supply Module from the front panel and  
push it firmly into its place.  
10. Tighten the six screws on the front panel of the MGC-50 that secure the  
Power Supply Module.  
11. Connect the red power cable to the +5V screw and ensure that the nut is  
well fastened and secured:  
—
—
—
—
—
First install the flat washer.  
Next, install the terminal ring of the power cable.  
Next, install the second flat washer.  
Then, install the spring washer.  
Last, screw the nut.  
5-14  
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MGC Hardware and Installation Manual  
12. Connect the black power cable to the -5V screw in the order described in  
step 11 and ensure that the nut is well fastened and secured.  
13. Reconnect the AC input (J1) and the 12V/5V Sense connectors (J2).  
14. Reposition the fans cover panel on the rear panel. Ensure that the two fan  
connectors are in their place and tighten the six screws to secure the fan  
cover to its place.  
15. Connect the AC power cable to the MCU and turn on the MCU.  
The green Power Supply Module LED should be green to indicate that  
the MCU power is on.  
Fan Replacement for the MGC-100  
The fans are hot swappable and can be replaced with the system running. The  
fans are located on the rear panel of the MGC-100. Use the following  
procedure to replace a faulty fan:  
1. Disconnect the cable to the fan.  
2. Unscrew the four screws on the rear panel of the MGC-100 that secure  
the fan.  
3. Remove the fan.  
4. Position the replacement fan correctly on the rear panel.  
5. Tighten the four screws on the rear panel of the MGC-100 that secure the  
fan.  
6. Connect the cable to the fan.  
5-15  
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Chapter 5 - System Maintenance  
Fan Replacement for the MGC-50  
The fans are not hot swappable and cannot be replaced with the system  
running. Fans are located on the rear pane of the MGC-50. Use the following  
procedure to replace a faulty fan:  
1. Exit the MGC Manager application, turn off the MCU and unplug it from  
the AC outlet.  
2. Using a standard Phillips screwdriver, remove six spring-loaded screws  
from the fans cover on the MCU’s rear panel.  
Lower the fans cover carefully without tearing the cables to gain access  
to its inner side.  
3. Disconnect the two connectors of the power supply cable from the inside  
of the fan panel. At this point, the fan panel is loose and it may be  
removed.  
4. From the inside of the fan panel, push the connector panel mount locks  
of the faulty fan connector and push the connector to the front of the  
panel.  
5-16  
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MGC Hardware and Installation Manual  
5. Unscrew the four screws on the Fans front panel that secure the faulty  
fan to the fan panel.  
6. Remove the fan.  
7. Position the replacement fan correctly on the rear panel.  
8. Tighten the four screws on the Fans front panel that secure the fan.  
9. Insert the connector to its place in the Fans panel and ensure that the  
panel mount locks are locked.  
10. Connect the two connectors of the power supply cable.  
11. Reposition the fans cover panel on the rear panel and tighten the six  
screws to secure the fan cover to its place.  
12. Connect the AC power cable to the MCU and turn on the MCU. Check  
the fan is working correctly.  
Replacing the Main Control Module  
The Main Control Module is not hot swappable. Use the following procedure  
for both the MGC-100 and the MGC-50 to replace the Main Control Module:  
1. Exit the MGC Manager application, as described in the MGC Manager  
User’s Guide.  
2. Switch off the main power switch on the rear panel and disconnect the  
power cord from the power source.  
3. Open the cover of the Main Control Module on the rear panel of the  
MGC.  
4. Disconnect all internal cables to the Main Control Module.  
5. Unscrew the four screws on the front panel of the MGC that secure the  
Main Control Module.  
6. Use the plastic ejectors to pull the Main Control Module out of its slot in  
the Backplane.  
7. Carefully slide the Main Control Module out through the front panel.  
8. Slide in the replacement Main Control Module.  
9. Push the Main Control Module firmly into the Backplane making sure it  
is properly seated in its slot.  
5-17  
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Chapter 5 - System Maintenance  
10. Tighten the four screws on the front panel of the MGC that secure the  
Main Control Module.  
11. Reconnect all internal cables to the Main Control Module.  
12. Close the cover of the Main Control Module on the rear panel of the  
MGC.  
13. Connect the power cord to the power source and switch ON the main  
power switch on the rear panel.  
14. Connect to the MCU via the MGC Manager, as described in the MGC  
User’s Guide.  
5-18  
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Troubleshooting  
The MGC unit provides on-line diagnostics for quick isolation and resolution  
of problems. The card status and the MCU's status can be viewed in the  
Browser and the Status areas of the MGC Manager main window. The full  
messages regarding the cards status can also be viewed in the Status box of  
the Card Settings dialog box. For more information, see the MGC  
Administrator’s Guide, Chapter 4, “MCU Card Management”.  
Faults and errors (usually software) are recorded in the Faults file and can be  
viewed in the faults dialog box (accessed from the MCU right-click pop-up  
menu). For more details, see the MGC Administrator’s Guide, Chapter 5.  
A list of system faults can be viewed via the Faults function. A detailed list of  
faults can be found in the MGC Administrator’s Guide, Appendix B.  
5-19  
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Chapter 5 - System Maintenance  
5-20  
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Appendix A: Interfaces Pin  
Assignment  
PRI Port Assignment  
Pin 8  
Pin 1  
Table A-1: PRI Port Assignment  
Pin  
Signal Name  
1
2
3
4
5
6
7
8
Receive Ring  
Receive Tip  
No connection  
Transmit Ring  
Transmit Tip  
No connection  
No connection  
No connection  
A-1  
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Appendix A: Interfaces Pin Assignment  
LAN PIN Assignment  
TD+  
TD-  
1
8
RD+  
RD-  
Figure A-1: LAN Pin Assignment  
Alarms Port Pin Assignment  
Minor  
Major  
Critical  
Pin 1  
Critical  
Major  
Minor  
Figure A-2: Alarm Port Pin Assignment  
A-2  
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MGC Hardware and Installation Manual  
RS-232 Pin Assignment  
DCD  
RxD  
TxD  
DTR  
GND  
Pin 1  
RI  
CTS  
RTS  
DSR  
Figure A-3: RS-232 Pin Assignment  
Table A-1: PRI Port Assignment  
Pin  
Description  
1
2
3
4
5
6
7
8
Data Carrier Detect (DCD)  
Receive Data (RXD)  
Transmit DATA (TXD)  
Data Terminal Ready (DTR)  
GROUND (GND)  
Data Set Ready (DSR)  
Clear to Send (CTS)  
Ring Indicator (RI)  
A-3  
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Appendix A: Interfaces Pin Assignment  
Serial Port Connectors Pin out Assignment  
SOURCE  
PIN  
NO.  
SOURCE  
SIGNAL  
DESIGNATION  
SIGNAL  
DESIGNATION  
PIN  
NO.  
1
2
Shield  
Common  
DTE  
Transmitted Data (B)  
Transmit Signal Element (A)  
Received Data (B)  
Receiver Signal Element Timing (A)  
Local Loopback  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
Return  
DCE  
Transmitted Data (A)  
Received Data (A)  
3
DCE  
Return  
DCE  
4
Request to Send (A)  
Clear to Send (A)  
DTE  
5
DCE  
DTE  
6
DCE Ready (A)  
DCE  
Return  
DTE  
Request to Send (B)  
DTE Ready (A)  
7
Signal Ground  
Common  
DCE  
8
Received Line Signal Detector (A)  
Receiver Signal Element Timing (B)  
Received Line Signal Detector (B)  
Ext. Transmit Signal Element Timing (B)  
Transmit Signal Element Timing (B)  
Clear to Send (B)  
DTE  
Remote Loopback  
DCE Ready (B)  
9
Return  
Return  
Return  
Return  
Return  
Return  
Return  
DTE  
10  
11  
12  
13  
DTE Ready (B)  
Ext. Transmit Element Timing (A)  
Test Mode  
DCE  
Figure A-4: RS-530 Pin out (DB-25)  
SOURCE  
PIN  
NO.  
SOURCE  
SIGNAL  
DESIGNATION  
PIN  
NO.  
SIGNAL  
DESIGNATION  
1
2
Shield  
Common  
DCE  
-
Receive Common  
KG Resync (B)  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
Common  
-
Signal Rate Indicator  
KG Resync (A)  
Send Data (A)  
3
Send Data (B)  
Return  
Return  
Return  
Return  
Return  
Return  
DTE  
4
DTE  
DCE  
DCE  
DTE  
DCE  
DCE  
DTE  
DCE  
DTE  
DCE  
DTE  
DCE  
DTE  
DTE  
DCE  
Common  
Send Timing (B)  
Receive Data (B)  
Request to Send (B)  
Receive Timing (B)  
Clear to Send (B)  
Terminal in Service  
Data Mode (B)  
5
Send Timing (A)  
Receive Data (A)  
Request to Send (A)  
Receive Timing (A)  
Clear to Send (A)  
Local Loopback  
Data Mode (A)  
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
Return  
Return  
Return  
DTE  
Terminal Ready (B)  
Receiver Ready (B)  
Select Standby  
Terminal Ready (A)  
Receiver Ready (A)  
Remote Loopback  
Incoming Call  
Signal Quality  
DCE  
New Signal  
DTE  
Select Frequency  
Terminal Timing (A)  
Test Mode  
Terminal Timing (B)  
Standby Indicator  
Send Common  
Return  
DCE  
Common  
Signal Ground  
Figure A-5: RS-449 Pin out (DB-37)  
A-4  
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MGC Hardware and Installation Manual  
SOURCE  
SIGNAL  
DESIGNATION  
PIN  
NO.  
SOURCE  
SIGNAL  
DESIGNATION  
PIN  
NO.  
Common  
Signal Ground  
Clear to Send  
Data Carrier Detect  
Ring Indicator  
Unassigned  
B
D
F
J
A
C
E
H
K
M
P
S
U
W
Y
Common  
Chassis Ground  
Request to Send  
Data Set Ready  
DCE  
DTE  
DCE  
DCE  
DCE  
Data Terminal Ready  
Unassigned  
DTE  
-
L
-
-
Unassigned  
N
R
T
V
X
Z
Unassigned  
-
DTE  
DTE  
DTE  
DTE  
DCE  
DCE  
-
DCE  
Receive Data (A)  
Receive Data (B)  
Receive Timing (A)  
Receive Timing (B)  
Unassigned  
Transmitted Data (A)  
Transmitted Data (B)  
Terminal Timing (A)  
Terminal Timing (B)  
Transmit Timing (A)  
DCE  
DCE  
DCE  
-
-
-
-
-
-
-
Unassigned  
BB  
AA Transmit Timing (B)  
CC  
Unassigned  
DD  
FF  
JJ  
Unassigned  
Unassigned  
EE Unassigned  
HH Unassigned  
-
Unassigned  
-
Unassigned  
LL  
KK  
-
Unassigned  
Unassigned  
NN  
MM Unassigned  
-
Figure A-6: V.35 Pin out (M-34 Connector)  
SIGNAL  
DESIGNATION  
PIN  
NO.  
SOURCE  
PIN  
NO.  
SIGNAL  
DESIGNATION  
SOURCE  
1
2
Shield  
-
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
(NB1)  
Digit Present  
(DPR)  
(NB2)  
3
Abandon Call and Retry  
Call Request  
Digit Signal Circuits  
(ACR)  
(NB3)  
4
(CRQ)  
(NB4)  
5
Present Next Digit  
Power Indication  
Signal Ground  
Unassigned  
Reserved for automatic calling equipment  
testing. These 2 pins shall not be  
wired in the data terminal equipment.  
(PND)  
Receive Common  
Send Common  
Unassigned  
RC  
6
(PWI)  
SC  
7
(SG)  
-
8
-
Unassigned  
-
9
-
Data Line Occupied  
Unassigned  
DLO  
10  
11  
12  
13  
-
-
-
-
Unassigned  
-
Unassigned  
Unassigned  
-
Unassigned  
Distant Station Connected  
(DSC)  
Figure A-7: RS-366 Pin out (DB-25)  
A-5  
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Appendix A: Interfaces Pin Assignment  
Cables For the MPI-8 Network Interface Module  
There are three new cables for interfacing with the MPI-8 Network Interface  
Module in DCE. The difference in the cables is that they have certain pins that  
are crossed.  
1. Part Number: CON2044A – Adapter RS-449 (BD37) to V.35 (female)  
crossed DCE.  
2. Part Number: CON 2045A- Adapter RS-449/EIA530 Crossed DCE  
(DB37M/DB37F).  
3. Part Number: CON2046A- Adapter RS-449/RS-449 Crossed DCE  
(DB37M/DB37F).  
A-6  
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