ALFA Switch ADH16SB User Manual

Quick Installation Guide  
for 16/24/32 ports  
Dual Speed Hub  
ADH16SB  
ADH24SB  
ADH32SB  
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Contents  
Chapter 1 Introduction ....................................1  
Chapter 2 Features & Specifications .................3  
Chapter 3 Package Contents .............................5  
Chapter 4 Physical Description ........................6  
Chapter 5 Installation ......................................9  
Chapter 6 Trouble-shooting .............................12  
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1
Introduction  
Congratulations on your purchase of this rackmount stackable dual-speed  
hub. Migrating from traditional 10Mbps Ethernet to 100Mbps Fast  
Ethernet is now simple and affordable with these dual-speed hubs. These  
high performance 16-port, 24-Port, 32-port 10/100Mbps stackable dual-  
speed hubs are equipped with 16, 24, 32 RJ45 dual-speed ports, one uplink  
port and one internal 2-port switch.  
Typically adual-speed hub has two independent internal network segments:  
10Mbps segment and 100Mbps segment. Depending on the speed of  
attached network devices, each individual port of  
a
dual-speed hub  
provides Auto-Negotiation capability which automatically senses and  
selects optimum speed at 10Mbps or 100Mbps. A 10Mbps network device  
attached to the dual-speed hub will be able to communicate with other  
network devices attached to the hub running at 10Mbps. On the other hand,  
a 100Mbps network device attached to the dual-speed hub will be able to  
communicate with other devices attached to the hub running at 100Mbps.  
Therefore, dual-speed hub can be 10Base-T hub when all the connecting  
nodes are running at 10Mbps as illustrated in Figure 1-1, or can be  
100Base-TX hub when all the connecting nodes are running at 100Mbps as  
illustrated in Figure 1-2. These stackable dual-speed hubs are the ideal  
hubs for both 10Base-T and 100Base-TX networks.  
10Mbps  
100Mbps  
10 11 12  
10Mbps  
100Mbps  
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24-Port10/100MbpsDual Speed Stackable Ethernet Huwitb  
h
Internal Switch  
24-Port10/100MbpsDual Speed Stackable Ethernet Huwitb  
h
Internal Switch  
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UTIL  
Switch  
Power  
100M  
Switch  
Power  
100M  
LNK/ACT  
LNK/ACT  
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10 11 12 13 14 15 16 17 18 19 20 21 22 23 24  
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10 11 12 13 14 15 16 17 18 19 20 21 22 23 24  
13 14 15 16  
21 22 23 24  
Uplink  
13 14 15 16  
21 22 23 24  
Uplink  
100Mbps  
10Mbps  
100Mbps  
10Mbps  
100Mbps  
10Mbps  
100Mbps  
10Mbps  
Figure 1-1 10Mbps segment connecting  
10Mbps devices  
Figure 1-2 100Mbps segment connecting  
100Mbps devices  
1
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Dual-Speed hub with internal switching function automatically switches  
data traffic between devices running at different speed, which allows  
communications between ports running at 10Mbps and ports running at  
100Mbps. Dual-Speed hub with internal switching function can save  
money by eliminate the need to purchase expensive Switches for users  
with mixed speed network environment. The connection of the Dual-  
Speed hub with internal switching function is illustrated as in Figure 1-3:  
Internal  
Switch  
10Mbps  
100Mbps  
1
5
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10 11 12  
17 18 19 20  
24-Port10/100MbpsDual Speed Stackable Ethernet Huwitb  
h
Internal Switch  
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UTIL  
Switch  
Power  
100M  
LNK/ACT  
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9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24  
13 14 15 16  
21 22 23 24  
Uplink  
100Mbps  
10Mbps  
10Mbps  
100Mbps  
Figure 1-3 Internal switch links 10Mbps and  
100Mbps segments  
When you ready to expand your network, the Uplink port provides an easy  
way to connect to another hub with regular straight-through Category 5  
cable  
These Dual Speed Hubs provide the stackable feature. They can stack  
together up to 6 hubs to form a logically Big dual-speed Hub.  
These Dual-Speed hubs can be set up as stand-alone units or it can be  
mounted on a standard 19" rack (rack mounting kits are included with the  
unit).  
2
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2
Features & Specifications  
(1) Features  
Consists of one internal 10Mbps Ethernet segment and one internal  
100Mbps Fast Ethernet segment.  
Supports Auto-Sensing RJ45 ports which automatically sense and  
select optimum speed and route data traffic to correspondinginternal  
segments.  
Built-in Uplink selection for the last port to connect with regular  
straight-through cable to another hub.  
Network Utilization LEDs provides simple reading on hub s traffic  
status.  
Built-in internal switching function automatically switches data  
traffic between devicesrunning at differentspeed establishes  
communications between ports running at 10Mbps and 100Mbps.  
Support stackable function for stacking up to 6 hubs to form a  
logically single dual-speed hub.  
Standard 19" Rack Mountable  
Two-year warranty  
3
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(2) Specifications  
Standards : IEEE802.3 & 802.3u  
10/100Mbps Ports : RJ45 x 16 (16-Port Rackmount DualSpeed Hub) or  
RJ45 x 24 (24-Port Rackmount DualSpeed Hub) or  
RJ45 x 32 (32-Port Rackmount DualSpeed Hub)  
Hub LEDs :Power, Internal Switch  
Segment LEDs :Collision, Utilization  
Port LEDs :Speed Status(10 or100), Link/Activity Status  
Internal Switch :1K MAC Address Table  
256KB Buffer Memory  
Dimensions : 17.3x 7.9 x1.75 in./440 x201 x 45mm  
Weight : 5.1 lb./2.3kg  
Power : 100-240VAC, 50-60Hz internalfull-range switching power  
Operating Temperature: 32-1310F (0-550C)  
Operating Humidity :10-95% (Noncondensing)  
Emission : FCCClass B &CE  
4
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3
Package Contents  
One Stackable Du-alSpeed Hub  
One power cord  
User s manual  
Stacking Cable  
Rackmountaccessories  
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16-Port10/100Mbps  
Uplink  
Switch  
Power  
1
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Dual Speed  
Stackable Ethernet Hub  
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16-Port Rackmount  
Dual Speed hub  
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COL  
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24-Port10/100Mbps  
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Uplink  
Switch  
Power  
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Dual Speed  
Stackable Ethernet Hub  
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CT  
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24-Port Rackmount  
Dual Speed hub  
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32-Port10/100Mbps  
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Uplink  
Switch  
Power  
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Stackable Ethernet Hub  
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21 22 23 24  
25 26 27 28  
29 30 31 32  
32-Port Rackmount  
Dual Speed hub  
Figure 3-1 Package contents  
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5
4
Physical Description  
(1)Panel  
LED Panel  
Uplink Port  
8
RJ45 connectors  
2
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UTIL  
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UTIL  
1
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10M  
COL  
10M  
COL  
1
3
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5
6
7
16-Port10/100Mbps  
Uplink  
Switch  
Power  
100M  
Dual Speed  
Stackable Ethernet Hub  
1
2
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9
10 11 12 13 14 15 16  
LNK  
ACT  
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10 11 12  
13 14 15 16  
IN  
OUT  
16-Port Rackmount  
Dual Speed Hub  
Stacking ports  
10M Col. and Util.LED  
100M Col. and Util.LED  
%
UTIL  
1
5
10 30 50+  
%
UTIL  
1
5
10 30 50+  
10M  
COL  
100M  
COL  
16-Port10/100Mbps  
100M  
LED  
100M  
Switch  
Power  
Dual Speed  
Stackable Ethernet Hub  
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16  
LNK  
ACT  
Link/Activity  
LED  
Internal Switch LED  
Power LED  
LED Panel  
24-Port10/100Mbps  
Uplink Port  
10 11 12  
RJ45 connectors  
6
%
UTIL  
1
5
1
0
3
0
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0
+
%
UTIL  
1
5
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10M  
COL  
100M  
COL  
1
2
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7
8
9
100M  
1
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1
0
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1
1
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LNK  
ACT  
Uplink  
Switch  
Power  
100M  
Dual Speed  
Stackable Ethernet Hub  
13 14 15 16 17 18 19 20 21 22 23 24  
LNK  
ACT  
13 14 15 16  
17 18 19 20  
21 22 23 24  
IN  
OUT  
24-Port Rackmount  
Dual Speed Hub  
Stacking ports  
10M Col. and Util.LED  
100M Col. and Util.LED  
%
UTIL  
1
5
10 30 50+  
%
UTIL  
1
5
10 30 50+  
10M  
COL  
100M  
COL  
24-Port10/100Mbps  
100M  
1
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5
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9
10 11 12  
LNK  
ACT  
100M  
LED  
100M  
Switch  
Power  
Dual Speed  
Stackable Ethernet Hub  
13 14 15 16 17 18 19 20 21 22 23 24  
LNK  
ACT  
Link/Activity  
LED  
Internal Switch LED  
Power LED  
Figure 4-1 Panel description  
6
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LED Panel  
Uplink Port  
13 14 15 16  
RJ45 connectors  
5
%
UTIL  
1
5
1
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UTIL  
1
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10 11 12  
10M  
COL  
100
COL  
100M  
1
2
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4
5
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8
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10 11 12 13 14 15 16  
LNK  
ACT  
Uplink  
Switch  
Power  
100M  
32-Port 10/100Mbps  
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32  
LNK  
ACT  
17 18 19 20  
21 22 23 24  
25 26 27 28  
29 30 31 32  
IN  
OUT  
32-Port Rackmount  
Dual Speed Hub  
Stacking ports  
10M Col. and Util.LED  
100M Col. and Util.LED  
%
UTIL  
1
5
10 30 50+  
%
UTIL  
1
5
10 30 50+  
10M  
COL  
100M  
COL  
32-Port10/100Mbps  
100M  
1
2
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4
5
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7
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9
10 11 12 13 14 15 16  
LNK  
ACT  
100M  
LED  
100M  
Switch  
Power  
Dual Speed  
Stackable Ethernet Hub  
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32  
LNK  
ACT  
Link/Activity  
LED  
Internal Switch LED  
Power LED  
Figure 4-1 Panel description (cont.)  
7
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(2)LED  
LED  
Color Status  
Description  
Power is supplied  
Number of LED  
Lit  
Green  
Off  
PWR  
(Power)  
One for thewhole Hub  
No power  
The internal switch isactive  
The internal switch isinactive  
Collision detected inthis segme
No Collision  
Lit  
Green  
Off  
Switch  
(Internal Switch
One for thewhole Hub  
Lit  
Yellow  
Off  
COL  
(Segment  
Collision)  
One for 10Mbps  
segment and onefor  
100Mbps segment  
UTIL.  
(Segment  
Utilization)  
One set for10Mbps  
Indicate network utilization segment and oneset for  
100Mbps segment  
Green  
Lit  
Lit  
A valid linkis established  
LNK/ACT  
(Link/Activity)  
Data packets received  
No link isestablished  
One for each port  
Green Flash  
Off  
This port runat 100Mbps  
Not connected orrun at 10M  
Lit  
Green  
Off  
One for each port  
100Mbps  
Table4-1 LED description  
8
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5
Installation  
1. Operating Environment  
These Dual Speed Hubs must be installed and operated within the limits  
of specified operating temperature and humidity (see previous section  
under Specifications). Do not place objects on top of the unit. Do not  
obstruct any vents at the sides of the unit. Do not position the hub near  
any heating source such as heater, radiator, or direct exposure to sun.  
Prevent entering of water and moisture into the unit. If necessary, use  
dehumidifier to reducehumidity.  
2. Connecting tonetwork devices  
Connect one end of the network cable to any of the RJ45 ports on the  
front panel, and connect the other end of the network cable to the RJ45  
port of the network device. The network cables must comply with  
EIA/TIA 568 specifications and Category 5 standard for 100Mbps data  
rate or minimum Category 3 for 10Mbps data rate. Maximum length  
between the hub and any network devices is 100 meters (300ft). Once  
the network cable is connected on both ends and the attached network  
devices are powered on, the green Link Status LED should be lit. If the  
connected network devices are running at 100Mbps, the green Speed  
LED (100M) shouldalso be lit.  
Dual Speed Hub  
Network  
Category 5  
EIA/TIA 568  
UTP Cable  
Adapter  
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24-Port10/100Mbps  
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CT  
Uplink  
10/100 FAST ETHERNET CARD  
Switch  
Power  
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Dual Speed  
Stackable Ethernet Hub  
FCC ID  
:
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21 22 23 24  
RTL8139  
100m  
Figure 5-1 Connect the huband network device  
3. Uplink toAnother Hub  
Use the uplinkport (the lastport) to connectto another hubas illustrated  
Connecting cable must comply with EIA/TIA 568  
in Figure 5-2.  
specifications and Category 5 (100Mbps) standards to connect the hubs.  
The Uplink port of the Dual-Speed hub supports Auto-Sensing function  
which will automatically sense the speed of the connected hub and  
operates at either 100Mbps or 10Mbps speed. If the connected hub is  
another Dual-Speed hub or 100Base-TX hub, the transmission speed  
between the twohubs will beset at 100Mbpsand the greenSpeed (100M)  
LED should belit. The maximumlength of thecable should notexceed 5  
meters (15ft) when connecting two hubs running at 100Mbps and 100  
meters (300ft) whenconnecting two hubsrunning at 10Mbps.  
9
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Uplink  
Uplink Port  
Dual Speed Hub  
10 11 12  
%
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24-Port10/100Mbps  
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L
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CT  
Uplink  
Switch  
Power  
0
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Dual Speed  
Stackable Ethernet Hub  
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21 22 23 24  
Uplink Port  
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24-Port10/100Mbps  
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Uplink  
Switch  
Power  
0
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Dual Speed  
Stackable Ethernet Hub  
1
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13 14 15 16  
17 18 19 20  
21 22 23 24  
Normal Port  
Figure 5-2 Uplink to another hub  
4. Stacking Hubs Together  
These Dual Speed Hubs provide two stacking ports. Users may connect two  
hubs using the supplied stacking cable. Connect one end of the stacking  
cable to the IN stacking connector of the hub and the other end of the  
stacking cable to another hub OUT stacking connector. You may stack up to  
10 hubs. The hubs cascaded together through stacking ports are in one  
collision domain and therefore considered as one logical dual speed hub.  
Internal  
Switch  
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24-Port10/100Mbps  
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CT  
Uplink  
Uplink  
Uplink  
S
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h
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o
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21 22 23 24  
1 12  
%
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-ob
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CT  
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Stackable Ethernet Hub  
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Figure 5-3 Stack 6 hubs together  
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21 223 24  
When you have two or more hubs stacked together, only one hub s internal  
switch is active, the others are inactive. Such design will eliminate a Loop  
in the network that might cause the whole network to malfunction.  
10  
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5. Connecting the power  
Connect the powercord to thepower socket onthe rear panelof the unit.  
Connect the powercord to thepower outlet andturn on powerswitch. The  
green Power LEDon the frontpanel should belit.  
IN  
OUT  
Figure 5-4 Connect the power cable  
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6
Trouble-shooting  
1. Power LED is not lit  
Check if the power cord is properly connected to the power outlet and the  
hub. Make sure the power switch on the hub is turned ON. .  
2. Link Status LED is not lit  
Check the power switch of the network devices attached to the hub, make  
sure they are turned ON.  
Check the network cable, make sure it is properly connected to the hub and  
the network device.  
Check the network cable, make sure the cable complies with EIA/TIA 568  
specification. Use straight-through Category 5 cables for 100Mbps  
connection and Category 3 or higher cables for 10Mbps connection.  
Check the slide switch and make sure it s in normal position when you use  
the last port on the hub to connect to workstations or file servers.  
3. The last port s Link Status LED is not lit when it is uplinked to  
another hub  
Make sure the cable is connected to the "uplink" connector.  
Check the network cable, make sure it is properly connected to both hubs.  
One end of the cable should be connected to uplink port while the other end  
of the cable should connected to a regular port. Do not connect the cable to  
both uplink ports.  
Check the network cable, make sure the cable complies with EIA/TIA 568  
specification. Use Category 5 cables for 100Mbps connection.  
Check the network cable, make sure the maximum length does not exceed 5  
meters (15ft) in 100Mbps connection and 100 meters (300ft) in 10Mbps  
connection.  
4. Collision LED flashes constantly  
Remove all the network cables, connect the cables back one by one to  
isolate the source of the collision.  
Check the network cable, inferior cable quality will result in excessive  
collision and error packets.  
[!] Contact your dealer if problempersist.  
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