Gigabit Ethernet
Smart Switches
AT-GS950/16
AT-GS950/24
Installation Guide
613-000190 Rev. B
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Electrical Safety and Emissions Standards
This product meets the following standards.
U.S. Federal Communications Commission
Radiated Energy
Note: This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15
of FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the
equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance with this instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case
the user will be required to correct the interference at his own expense.
Note: Modifications or changes not expressly approved of by the manufacturer or the FCC, can void your right to operate
this equipment.
Industry Canada
This Class A digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations.
Cet appareil numérique de la classe A respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada.
RFI Emissions
FCC Class A, EN55022 Class A, EN61000-3-2, EN61000-3-3, C-TICK,
CE
Warning: In a domestic environment this product may cause radio interference in
which case the user may be required to take adequate measures.
Immunity
EN55024
Electrical Safety
EN60950 (TUV), UL 60950 (CULUS)
Laser Safety
EN60825
3
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Translated Safety Statements
Important: The ꢀ indicates that a translation of the safety statement is available in a PDF
document titled “Translated Safety Statements” (613-000405) posted on the Allied Telesis website at
4
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Contents
Preface ................................................................................................................................................................................11
Safety Symbols Used in this Document................................................................................................................................12
Where to Find Web-based Guides .......................................................................................................................................13
Contacting Allied Telesis ......................................................................................................................................................14
Online Support ..............................................................................................................................................................14
Email and Telephone Support.......................................................................................................................................14
Returning Products........................................................................................................................................................14
Sales or Corporate Information .....................................................................................................................................14
Warranty........................................................................................................................................................................14
Management Software Updates....................................................................................................................................14
Chapter 1: Overview ..........................................................................................................................................................15
Features ...............................................................................................................................................................................16
Front and Back Panels .........................................................................................................................................................17
Ports .....................................................................................................................................................................................18
Twisted Pair Ports .........................................................................................................................................................18
Uplink Combo Ports ......................................................................................................................................................18
RS-232 Console Port ....................................................................................................................................................18
LEDs.....................................................................................................................................................................................19
Power Supply .......................................................................................................................................................................21
Network Topologies..............................................................................................................................................................22
Power Workgroup Topology..........................................................................................................................................22
Collapsed Backbone .....................................................................................................................................................23
Chapter 2: Installation .......................................................................................................................................................25
Reviewing Safety Precautions..............................................................................................................................................26
Selecting a Site for the Switch..............................................................................................................................................28
Cable Specifications .............................................................................................................................................................29
Unpacking the Switch...........................................................................................................................................................30
Installing the Switch on a Desktop........................................................................................................................................31
Installing the Switch in an Equipment Rack..........................................................................................................................32
Installing an Optional SFP Transceiver ................................................................................................................................34
Cabling the Switch................................................................................................................................................................37
Powering On the Switch .......................................................................................................................................................38
Chapter 3: Troubleshooting ..............................................................................................................................................39
Appendix A: Technical Specifications .............................................................................................................................41
Physical Specifications.........................................................................................................................................................41
Environmental Specifications................................................................................................................................................41
Power Specifications ............................................................................................................................................................41
Safety and Electromagnetic Emissions Certifications...........................................................................................................42
Connectors and Port Pinouts................................................................................................................................................42
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Contents
6
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Figures
Figure 1. AT-GS950/16 and AT-GS950/24 Front Panels....................................................................................................17
Figure 2. AT-GS950/16 and AT-GS950/24 Back Panels.....................................................................................................17
Figure 3. AT-GS950/16 and AT-GS950/24 System and Port LEDs ....................................................................................19
Figure 4. Power Workgroup Topology.................................................................................................................................22
Figure 5. Collapsed Backbone Topology.............................................................................................................................23
Figure 6. Attaching the Rubber Feet ...................................................................................................................................31
Figure 7. Attaching the Rack-Mount Bracket to the AT-GS950/16 Switch ..........................................................................32
Figure 8. Attaching the Rack-Mount Bracket to the AT-GS950/24 Switch ..........................................................................32
Figure 9. Mounting the AT-GS950/16 Switch in an Equipment Rack..................................................................................33
Figure 10. Mounting the AT-GS950/24 Switch in an Equipment Rack................................................................................33
Figure 11. Removing the Dust Plug from the SFP Slot .......................................................................................................34
Figure 12. Inserting the SFP................................................................................................................................................35
Figure 13. Positioning the SFP Handle in the Upright Position ...........................................................................................35
Figure 14. Plugging in the AC Power Cord..........................................................................................................................38
Figure 15. RJ-45 Connector and Port Pin Layout................................................................................................................42
7
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Figures
8
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Tables
Table 1. Safety Symbols .....................................................................................................................................................12
Table 2. System LEDs ........................................................................................................................................................19
Table 3. 10/100/1000Base-T Port LEDs .............................................................................................................................19
Table 4. SFP Port LEDs .....................................................................................................................................................20
Table 5. Twisted Pair Cabling and Distances .....................................................................................................................29
Table 6. MDI Pin Signals (10Base-T or 100Base-TX) ........................................................................................................42
Table 7. MDI-X Pin Signals (10Base-T or 100Base-TX) ....................................................................................................43
Table 8. RJ-45 1000Base-T Connector Pinouts .................................................................................................................43
9
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Tables
10
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Preface
Safety Symbols Used in this Document
This document uses the safety symbols defined in Table 1.
Table 1. Safety Symbols
Symbol Meaning
Description
Caution
Performing or omitting a specific action may
result in equipment damage or loss of data.
Warning
Performing or omitting a specific action may
result in electrical shock.
12
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AT-GS950/16 and AT-GS950/24 Gigabit Ethernet Smart Switches Installation Guide
Where to Find Web-based Guides
The installation and user guides for all Allied Telesis products are available
in portable document format (PDF) on our web site at
www.alliedtelesis.com. You can view the documents online or download
them onto a local workstation or server.
13
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Preface
Contacting Allied Telesis
This section provides Allied Telesis contact information for technical
support as well as sales and corporate information.
the Knowledge Base to submit questions to our technical support staff and
review answers to previously asked questions.
Telephone
Support
Returning Products for return or repair must first be assigned a return materials
authorization (RMA) number. A product sent to Allied Telesis without an
Products
RMA number will be returned to the sender at the sender’s expense. For
instructions on how to obtain an RMA number, go to the Support section
Sales or You can contact Allied Telesis for sales or corporate information through
Corporate
Information
Warranty The AT-GS950/16 and AT-GS950/24 Switches have a Lifetime Warranty
the terms and conditions of the warranty and for warranty registration.
Management New releases of the management software for our managed products are
available from the following Internet sites:
Software Updates
If the FTP server prompts you to log on, enter “anonymous” as the user
name and your email address as the password.
14
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Chapter 1: Overview
Features
The features of the AT-GS950/16 and AT-GS950/24 Gigabit Ethernet
Switches include:
ˆ LEDs for unit and port status
ˆ 16 or 24 Auto-Negotiating 10/100/1000Base-T twisted pair ports with
RJ-45 connectors
ˆ Two small form-factor pluggable (SFP) ports
ˆ Auto MDI/MDI-X on the twisted pair ports
ˆ IEEE 802.3 and IEEE 802.3u compliant
ˆ IEEE 802.3x flow control in full-duplex operation; back pressure in
half-duplex operation
ˆ IEEE 802.1P based Quality of Service support
ˆ IEEE 802.1Q based tagged VLAN support
ˆ IEEE 802.1X based authentication
ˆ Port mirroring
ˆ Link aggregation
ˆ Store and forward switching mode
ˆ Dynamic Host Configuration Protocol (DHCP) client
ˆ 8K MAC address table with automatic aging
ˆ Menus- and web-based configuration using the AT-S79 management
software
16
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AT-GS950/16 and AT-GS950/24 Gigabit Ethernet Smart Switches Installation Guide
Front and Back Panels
Figure 1 illustrates the front panels of the AT-GS950/16 and AT-GS950/24
Gigabit Ethernet Switches.
AT-GS950/16
AT-GS950/16
16-Port 10/100/1000Mbps
11 13 15
+
2
SFP Combo WebSmart Switch
1
3
5
7
9
SPEED
LINK/ACT
SPEED
LINK/ACT
LINK/ACT
15 16
POWER
2
4
6
8
10 12 14 16
1295
10/100/1000Base
Twisted Pair Ports
SFP Ports
Port and System LEDs
Console Port
AT-GS950/24
AT-GS950/24
24-Port 10/100/1000Mbps
+
2
SFP Combo WebSmart Switch
1
3
5
7
9
11 13 15 17 19 21 23
SPEED
LINK/ACT
SPEED
LINK/ACT
LINK/ACT
POWER
2
4
6
8
10 12 14 16 18 20 22 24
23 24
1296
Port and System LEDs
SFP Ports
Console Port
10/100/1000Base Twisted Pair Ports
Figure 1. AT-GS950/16 and AT-GS950/24 Front Panels
Figure 2 illustrates the back panel of the switches.
AT-GS950/16 and AT-GS950/24
733
Figure 2. AT-GS950/16 and AT-GS950/24 Back Panels
17
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Chapter 1: Overview
Ports
The AT-GS950/16 and AT-GS950/24 Layer 2 Gigabit Ethernet Switches
feature 16 or 24 twisted pair ports and two slots for optional SFP
transceivers.
Twisted Pair The twisted pair ports are 10Base-T, 100Base-TX, and 1000Base-TX
compliant. They automatically set their speed and duplex mode with IEEE
802.3u Auto-Negotiation. If desired, you can disable Auto-Negotiation on a
port and manually set the speed and duplex mode.
Ports
Note
If a switch port is connected to an end node that is not using Auto-
Negotiation, you should disable Auto-Negotiation on the port and set
its speed and duplex mode manually. Otherwise, a duplex mode
mismatch might occur.
The twisted pair ports feature 8-pin RJ-45 connectors. For the port
The ports have a maximum operating distance of 100 m
(328 feet). For 10 Mbps operation, the ports require Category 3 or better
100 ohm shielded or unshielded twisted pair cabling. For 100 or 1000
Mbps operation, the ports require Category 5 or Enhanced Category 5
(5E) 100 ohm shielded or unshielded twisted pair cabling.
Also featured on the ports is auto-MDI, which automatically configures the
ports as MDI or MDI-X. This allows you to use straight-through twisted pair
cable regardless of the configuration of the ports on the end nodes.
Uplink Combo The switch has two pairs of uplink ports, each consisting of one 10/100/
1000Base-T twisted pair port and one slot for an optional SFP transceiver.
The ports are numbered 15 and 16 on the AT-GS950/16 Switch and 23
and 24 on the AT-GS950/24 Switch.
Ports
You can use one port in a combo pair at a time. A link on an SFP
transceiver takes precedence over a link on a 10/100/1000Base-T twisted
pair port in the same combo pair. If the SFP slot is empty or if it has an
SFP module but the module does not have a link to an end node, the
10/100/1000Base-T twisted pair port of the pair is active. If an SFP
transceiver is installed and has a link to an end node, the twisted pair port
in the pair is inactive.
RS-232 Console The RS-232 console port is for local management of the switch with the
AT-S79 Management Software. Local management uses the
management cable supplied with the switch.
Port
18
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AT-GS950/16 and AT-GS950/24 Gigabit Ethernet Smart Switches Installation Guide
LEDs
AT-GS950/16
AT-GS950/16
16-Port 10/100/1000Mbps + 2 SFP Combo WebSmart Switch
11 13 15
1
3
5
7
9
SPEED
LINK/ACT
SPEED
LINK/ACT
LINK/ACT
POWER
2
4
6
8
10 12 14 16
15 16
1297
AT-GS950/24
AT-GS950/24
24-Port 10/100/1000Mbps + 2 SFP Combo WebSmart Switch
11 13 15 17 19 21 23
1
3
5
7
9
SPEED
LINK/ACT
SPEED
LINK/ACT
LINK/ACT
POWER
23 24
2
4
6
8
10 12 14 16 18 20 22 24
1298
Figure 3. AT-GS950/16 and AT-GS950/24 System and Port LEDs
Table 2 describes the system LEDs.
Table 2. System LEDs
LED
State
Description
POWER
Off
On
The switch is not receiving power.
The switch is receiving power.
Table 3 describes the LEDs for the 10/100/1000Base-T ports.
Table 3. 10/100/1000Base-T Port LEDs
LED
State
Description
SPEED
On
Off
The port is operating at 1000 Mbps.
The port is operating at 10/100 Mbps or no
link is established.
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Chapter 1: Overview
Table 3. 10/100/1000Base-T Port LEDs (Continued)
LED
State
Description
LINK/ACT Off
The port has not established a link with an
end node.
Blinking
The port is transmitting or receiving data.
Green
Green
A valid link has been established on the port.
Table 4 describes the LEDs for the SFP ports.
Table 4. SFP Port LEDs
LED
State
Description
LINK/ACT Off
The port has not established a link with an
end node.
Blinking
The port is transmitting or receiving data.
Green
Green
A valid link has been established on the port.
20
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AT-GS950/16 and AT-GS950/24 Gigabit Ethernet Smart Switches Installation Guide
Power Supply
The switches have an internal power supply with a single AC power supply
socket on the back panel which features autoswitch AC inputs. To power
the switch on or off, connect or disconnect the power cord provided with
the switch. A power cord is supplied with the switch.
Note
For the power requirements, refer to “Power Specifications” on
21
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Chapter 1: Overview
Network Topologies
This section illustrates two network topologies of the AT-GS950/16 and
AT-GS950/24 Layer 2 Gigabit Ethernet Switches: a power workgroup and
collapsed backbone.
workgroup topology. This topology provides the best in performance and
reliability because each end node is connected directly to the AT-GS950/
24 Switch with a dedicated network link.
Workgroup
Topology
AT-GS950/24 Switch
AT-GS950/24
24-Port 10/100/1000Mbps SFP Combo WebSmart Switch
+
2
1
3
5
7
9
11 13 15 17 19 21 23
SPEED
LINK/ACT
SPEED
LINK/ACT
LINK/ACT
POWER
2
4
6
8
10 12 14 16 18 20 22 24
2
3
2
4
1296
Legend
100 Mbps
1000 Mbps
Figure 4. Power Workgroup Topology
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AT-GS950/16 and AT-GS950/24 Gigabit Ethernet Smart Switches Installation Guide
other managed and unmanaged Ethernet switches to form a collapsed
Backbone
backbone topology. The AT-GS950/16 Switch functions as the focal point
of the network by transferring Ethernet frames between the switches. This
topology reduces the amount of unnecessary traffic in each workgroup,
because the AT-GS950/16 Switch transfers frames only when the source
and destination end nodes are located on different switches. This frees up
bandwidth and improves network performance
AT-GS950/16 Switch
AT-GS950/16
16-Port 10/100/1000Mbps
11 13 15
+
2
SFP Combo WebSmart Switch
1
3
5
7
9
SPEED
LINK/ACT
SPEED
LINK/ACT
LINK/ACT
15 16
POWER
2
4
6
8
10 12 14 16
1295
AT-GS900/8E Switch
AT-GS900/16 Switch
AT-G
S
h
900/8E
10M
1
0
/1
0
0
/1
0
0
0
B
A
S
E
-T
G
igabit
E
therne
t
S
witc
1000M
100M
LINK/ACT
FDX
POWER
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
561
601
600
AT-GS900/24 Switch
Legend
10 Mbps
100 Mbps
1000 Mbps
Figure 5. Collapsed Backbone Topology
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Chapter 1: Overview
24
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Chapter 2: Installation
Reviewing Safety Precautions
Please review the following safety precautions before you begin to install
the chassis or any of its components.
Note
The ꢀ indicates that a translation of the safety statement is
available in a PDF document titled “Translated Safety Statements”
(613-000405) posted on the Allied Telesis website at
Warning: To prevent electric shock, do not remove the cover. No
user-serviceable parts inside. This unit contains hazardous
voltages and should only be opened by a trained and qualified
technician. To avoid the possibility of electric shock, disconnect
electric power to the product before connecting or disconnecting
the LAN cables. ꢀ E1
Warning: Do not work on equipment or cables during periods of
lightning activity. ꢀ E2
Warning: Power cord is used as a disconnection device. To de-
energize equipment, disconnect the power cord. ꢀ E3
Warning: Class I Equipment. This equipment must be earthed.
The power plug must be connected to a properly wired earth
ground socket outlet. An improperly wired socket outlet could
place hazardous voltages on accessible metal parts. ꢀ E4
Pluggable Equipment. The socket outlet shall be installed near
the equipment and shall be easily accessible. ꢀ E5
Caution: Air vents must not be blocked and must have free
access to the room ambient air for cooling. ꢀ E6
Warning: Operating Temperature. This product is designed for a
maximum ambient temperature of 40° degrees C. ꢀ E7
All Countries: Install product in accordance with local and
National Electrical Codes. ꢀ E8
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AT-GS950/16 and AT-GS950/24 Gigabit Ethernet Smart Switches Installation Guide
Circuit Overloading: Consideration should be given to the
connection of the equipment to the supply circuit and the effect
that overloading of circuits might have on overcurrent protection
and supply wiring. Appropriate consideration of equipment
nameplate ratings should be used when addressing this
concern. ꢀ E21
Warning: Mounting of the equipment in the rack should be such
that a hazardous condition is not created due to uneven
mechanical loading. ꢀ E25
If installed in a closed or multi-unit rack assembly, the operating
ambient temperature of the rack environment may be greater
than the room ambient temperature. Therefore, consideration
should be given to installing the equipment in an environment
compatible with the manufacturer’s maximum rated ambient
temperature (Tmra). ꢀ E35
Caution: Installation of the equipment in a rack should be such
that the amount of air flow required for safe operation of the
equipment is not compromised. ꢀ E36
Warning: Reliable earthing of rack-mounted equipment should
be maintained. Particular attention should be given to supply
connections other than direct connections to the branch circuits
(e.g., use of power strips). ꢀ E37
27
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Chapter 2: Installation
Selecting a Site for the Switch
Observe the following requirements when choosing a site for your switch:
ˆ If you plan to install the switch in an equipment rack, ensure that the
rack is safely secured and that it will not tip over. Devices in a rack
should be installed starting at the bottom, with the heavier devices
near the bottom of the rack.
ˆ If you are installing the switch on a table, ensure that the table is level
and secure.
ˆ The power outlet for the switch should be located near the unit and
should be easily accessible.
ˆ The site should provide for easy access to the ports on the front of the
switch. This will make it easier for you to connect and disconnect
cables, as well as view the switch’s LEDs.
ˆ To allow proper cooling of the switch, air flow around the unit and
through its vents on the side and rear should not be restricted.
ˆ Do not place objects on top of the switch.
ˆ Do not expose the switch to moisture or water.
ˆ Ensure that the site is a dust-free environment.
ˆ You should use dedicated power circuits or power conditioners to
supply reliable electrical power to the network devices.
28
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AT-GS950/16 and AT-GS950/24 Gigabit Ethernet Smart Switches Installation Guide
Cable Specifications
Table 5 contains the cable specifications for the twisted pair ports.
Table 5. Twisted Pair Cabling and Distances
Maximum
Speed
Type of Cable
Operating
Distance
10 Mbps
Standard TIA/EIA 568-B-compliant 100 m (328 ft)
Category 3 or better shielded or
unshielded cabling with 100 ohm
impedance and a frequency of 16
MHz.
100 Mbps
Standard TIA/EIA 568-A-compliant 100 m (328 ft)
Category 5 or TIA/EIA 568-B-
compliant Enhanced Category 5
(Cat 5e) shielded or unshielded
cabling with 100 ohm impedance
and a frequency of 100 MHz.
1000 Mbps
Standard TIA/EIA 568-A-compliant 100 m (328 ft)
Category 5 or TIA/EIA 568-B-
compliant Enhanced Category 5
(Cat 5e) shielded or unshielded
cabling with 100 ohm impedance
and a frequency of 100 MHz.
Note
The twisted pair ports on the switch feature auto-MDI when
operating at 10, 100 or 1000 Mbps. Each of the ports is individually
configured as MDI or MDI-X when connected to an end node.
Consequently, you can use a straight-through twisted pair cable
when connecting any type of network device to a port on the switch.
29
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Chapter 2: Installation
Unpacking the Switch
To unpack the switch, perform the following procedure:
1. Remove all components from the shipping package.
Note
Store the packaging material in a safe location. You must use the
original shipping material if you need to return the unit to Allied
Telesis.
2. Place the switch on a level, secure surface.
3. Verify that the following hardware components are included in your
switch package. If any item is missing or damaged, contact your Allied
Telesis sales representative for assistance.
ˆ One AT-GS950/16 or AT-GS950/24 Smart Switch
ˆ Two rack-mount brackets
ˆ Eight rack-mount bracket screws (black)
ˆ Four rack-mounting screws (stainless steel)
ˆ Four rubber feet (for desktop use)
ˆ One management cable
ˆ One power cord
ˆ Documentation CD
30
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AT-GS950/16 and AT-GS950/24 Gigabit Ethernet Smart Switches Installation Guide
Installing the Switch on a Desktop
You can install the AT-GS950/16 and AT-GS950/24 Gigabit Ethernet
Smart Switches on a desktop or in a standard 19-inch equipment rack. To
install the switch in a rack, refer to “Installing the Switch in an Equipment
To place the switch on a desktop, perform the following procedure:
1. Remove all equipment from the package and store the packaging
material in a safe place.
2. Turn the switch over and attach the four rubber feet to the bottom of
1 6 1 5
L I N K / A
1 6 1 4 1 2 1 0
L I N K / A
8
6
4
2
W E P R O
T C
T C
T C
S P E E D
L I N K / A
S P E E D
5 1 3 1 1 1
9
7
1
3
t S w i t c h e b S m a r
t 1 o 0 r / 1 0 1 0 6 / 1 - P 0 0 0 M b p s + 2 S F P C o
-
m
G T
b o
5 S A W 9 5 0 / 1 6
1299
Figure 6. Attaching the Rubber Feet
3. Turn the switch over again and place it on a flat, secure surface (such
as a desk or table) leaving ample space around the unit for ventilation.
31
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Chapter 2: Installation
Installing the Switch in an Equipment Rack
To install the switch in a standard 19-inch equipment rack, perform the
following procedure:
1. If attached, remove the rubber feet using a flat-head screwdriver.
2. Install a bracket on one side of the switch using a Phillips screwdriver
and four of the rack-mount screws included with the switch. Figure 7
and Figure 8 illustrate installing the brackets on the AT-GS950/16 and
AT-GS950/24 Switches, respectively.
16
761
Figure 7. Attaching the Rack-Mount Bracket to the AT-GS950/16 Switch
23
24
743
Figure 8. Attaching the Rack-Mount Bracket to the AT-GS950/24 Switch
3. Repeat step 2 to attach the remaining bracket to the other side of the
switch.
32
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AT-GS950/16 and AT-GS950/24 Gigabit Ethernet Smart Switches Installation Guide
4. Mount the switch in a standard 19-inch equipment rack using the four
AT-GS950/16 Switch and AT-GS950/24 Switch, respectively.
16
762
Figure 9. Mounting the AT-GS950/16 Switch in an Equipment Rack
23
24
760
Figure 10. Mounting the AT-GS950/24 Switch in an Equipment Rack
33
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Chapter 2: Installation
Installing an Optional SFP Transceiver
The AT-GS950/16 and AT-GS950/24 Gigabit Ethernet Smart Switches
have two slots for optional SFP transceivers. To install an SFP
transceiver, perform the following procedure:
Note
The transceiver can be hot-swapped; you do not need to power off
the switch to install a transceiver. However, always remove the
cables before removing the transceiver.
Note
You should always install the transceiver before connecting the fiber
optic cables to it.
1. Remove the transceiver from its shipping container and store the
packaging material in a safe location.
Warning
An SFP transceiver can be damaged by static electricity. Be sure to
observe all standard electrostatic discharge (ESD) precautions,
such as wearing an antistatic wrist strap, to avoid damaging the
transceiver.
737
Figure 11. Removing the Dust Plug from the SFP Slot
3. Position the SFP transceiver with the label facing up.
34
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AT-GS950/16 and AT-GS950/24 Gigabit Ethernet Smart Switches Installation Guide
4. Slide the transceiver into the SFP slot until it clicks into place.
738
Figure 12. Inserting the SFP
5. Verify that the handle on the transceiver is in the upright position, as
being dislodged from the slot.
SFP Transceiver
Handle
1300
Figure 13. Positioning the SFP Handle in the Upright Position
6. Repeat steps 2 through 5 to install another SFP transceiver.
Note
SFP transceivers are dust sensitive. When a fiber optic cable is not
installed, or when you store the SFP, always keep the plug in the
optical bores. When you do remove the plug, keep it for future use.
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Chapter 2: Installation
Note
Unnecessary removal and insertion of an SFP can lead to
premature failure.
For information on the cable specifications of the SFP, consult the
documentation shipped with the SFP.
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AT-GS950/16 and AT-GS950/24 Gigabit Ethernet Smart Switches Installation Guide
Cabling the Switch
Observe the following guidelines when connecting twisted pair and fiber
optic cables to the ports on the switch:
ˆ The connector on the cable should fit snugly into the port on the
switch. The tab on the connector should lock the connector into place.
ˆ Because the twisted pair ports have auto-MDI/MDI-X, you can use
straight-through twisted pair cable to connect any type of network
device to the switch.
ˆ If your network topology contains a loop where two or more network
devices can communicate with each other over more than one network
path, do not connect the network cables forming the loop until after you
have activated the Rapid Spanning Tree Protocol on the switch. Data
loops can adversely affect network performance.
ˆ If you are creating a port trunk, configure the switch’s management
software before connecting the cables of the trunk to the switch.
Otherwise, a network loop will result which can adversely affect
network performance.
ˆ In order for a switch port to successfully Auto-Negotiate its duplex
mode with an end node, the end node should also be using Auto-
Negotiation. Otherwise, a duplex mode mismatch can occur. A switch
port using Auto-Negotiation defaults to half-duplex if it detects that the
end node is not using Auto-Negotiation. This can result in a mismatch
if the end node is operating at a fixed duplex mode of full-duplex.
To avoid this problem, disable Auto-Negotiation on a switch port and
set the port’s speed and duplex mode manually if the end node has a
fixed duplex mode of full-duplex.
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Chapter 2: Installation
Powering On the Switch
To power on the switch, perform the following procedure:
1. Plug the power cord into the AC power connector on the back of the
switch, as shown in Figure 14.
741
Figure 14. Plugging in the AC Power Cord
2. Plug the other end of the power cord into a wall outlet.
Warning: Power cord is used as a disconnection device. To de-
energize equipment, disconnect the power cord. ꢀ E3
Pluggable Equipment. The socket outlet shall be installed near
the equipment and shall be easily accessible. ꢀ E5
3. Verify that the POWER LED is green. If the LED is OFF, refer to
The switch is now powered on and ready for network operations. For
information on how to manage the switch, refer to the AT-S79
Management Software User’s Guide.
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Chapter 3
Troubleshooting
This chapter contains information on how to troubleshoot the switch if a
problem occurs.
Note
For further assistance, please contact Allied Telesis Technical
Support. Refer to “Contacting Allied Telesis” on page 14.
Check the POWER LED on the front of the switch. If the LED is off,
indicating that the unit is not receiving power, do the following:
ˆ Verify that the power cord is securely connected to the power source
and to the AC connector on the back panel of the switch.
ˆ Verify that the power outlet has power by connecting another device
to it.
ˆ Try connecting the unit to another power source.
ˆ Try using a different power cord.
ˆ Verify that the voltage from the power source is within the required
levels for your region.
Verify that the LINK/ACT LED for each port is ON. If a LINK/ACT LED is
OFF, do the following:
ˆ Verify that the end node connected to the port is powered on and is
operating properly.
ˆ Verify that the twisted pair cable is securely connected to the port on
the switch and to the port on the end node.
ˆ Verify that the twisted pair cable does not exceed 100 meters (328
feet).
ˆ Verify that you are using the appropriate category of twisted pair cable:
Category 3 or better for 10 Mbps operation and Category 5 and
Category 5E for 100 and 1000 Mbps operation.
Note
A 1000Base connection may require five to ten seconds to establish
a link.
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Chapter 3: Troubleshooting
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Appendix A
Technical Specifications
Physical Specifications
Dimensions:
AT-GS950/16
AT-GS950/24
330 mm x 230.7 mm x 43.2 mm
(12.99 in x 9.08 in x 1.7 in)
440 mm x 257 mm x 43.2 mm
(17.32 in x 10.12 in x 1.7 in)
Weight:
AT-GS950/16
AT-GS950/24
2.38 kg (5.25 lbs)
3.25 kg (7.15 lbs)
Environmental Specifications
Operating Temperature:
0° C to 40° C (32° F to 104° F)
Storage Temperature:
Operating Humidity:
Storage Humidity:
-25° C to 70° C (-13° F to 158° F)
5% to 90% non-condensing
5% to 95% non-condensing
Up to 3,000 m (9,843 ft)
Operating Altitude Range:
Power Specifications
Input Supply Voltage:
Power Consumption:
100 - 240 VAC, 50 - 60 Hz
AT-GS950/16 33 W
AT-GS950/24 37.2 W
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Appendix A: Technical Specifications
Safety and Electromagnetic Emissions Certifications
EMI/RFI:
FCC Class A, EN55022 Class A,
CISPR Class A
Immunity:
EN55024
Electrical Safety:
EN60950 (TUV), UL60950 (cULus)
,
C-TICK, CE
Connectors and Port Pinouts
This section lists the connectors and connector pinouts for the
AT-GS950/16 and AT-GS950/24 switches and their components.
Figure 15 illustrates the pin layout for an RJ-45 connector and port.
8
8
1
1
Figure 15. RJ-45 Connector and Port Pin Layout
Table 6 lists the RJ-45 pin signals when a twisted pair port is operating in
the MDI configuration.
Table 6. MDI Pin Signals (10Base-T or 100Base-TX)
Pin
Signal
TX+
1
2
3
6
TX-
RX+
RX-
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AT-GS950/16 and AT-GS950/24 Gigabit Ethernet Smart Switches Installation Guide
Table 7 lists the RJ-45 port pin signals when a twisted pair port is
operating in the MDI-X configuration.
Table 7. MDI-X Pin Signals (10Base-T or 100Base-TX)
Pin
Signal
RX+
1
2
3
6
RX-
TX+
TX-
Table 8 lists the RJ-45 connector pins and their signals when a
1000Base-T port is operating at 1000 Mbps.
Table 8. RJ-45 1000Base-T Connector Pinouts
Pin
Pair
Signal
1
2
3
4
5
6
7
8
1
1
2
3
3
2
4
4
TX and RX+
TX and RX-
TX and RX+
TX and RX+
TX and RX-
TX and RX-
TX and RX+
TX and RX-
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Appendix A: Technical Specifications
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