Accton Technology Switch 12SE User Manual

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Fast EtherHub Installation Manual  
INTRODUCTION  
General Description  
The EH3008C and EH3012C 100BASE-TX 8/ 12 port stackable hubs  
are entry level 100Mbps Fast Ethernet hubs. They are built around a  
standard 19-inch chassis which allows stand-alone or rack-mounted  
operation.  
These 100BASE-TX 8/ 12 port stackable hubs are economical Fast  
Ethernet hubs with 8/ 12 100BASE-TX (RJ-45) ports for workstation  
connection. An uplink port in the front panel permits cascading to  
another 100BASE-TX Fast Ethernet hub (when the hubs are not  
stacked), or to a Fast Ethernet switch.  
The EH3008C and EH3012C are compatible with the IEEE 802.3u  
standard. They are easy to install, no DIP switch to set and no software  
to load. Just plug in the power cord and connect up to 8/ 12  
100BASE-TX station ports.  
The LINK/ ACTIVITY and ERROR indicate status for each port. The  
Collision and Power LEDs indicate status for overall system.  
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Fast EtherHub Installation Manual  
Key Features  
Compliant with the IEEE802.3u 100Mbps repeater specification  
8/ 12 100BASE-TX ports for Fast Ethernet connectivity  
19-inch rack mountable  
Supports Category 5 unshielded twisted-pair cabling (UTP)  
Stackable architecture supports up to 4 hubs with 100BASE-TX  
An uplink port on the front panel for cascading to another  
100BASE-TX hub (when the hub is not stacked)  
Individual port status LEDs for LINK/ ACTIVITY and ERROR  
indication  
Global Collision status LED  
Compliance with 100BASE-TX Class I (when stacked) and Class II  
(when stand-alone)  
Auto-partitioning of ports receiving excessive collisions  
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Fast EtherHub Installation Manual  
Package Contents  
Check your package contents for the following parts:  
æ
8/12 port 100BASE-TX Fast Ethernet Stackable Hub  
(Fast EtherHub-8se or Fast EtherHub-12se)  
æ
æ
æ
æ
Power Cord  
Stackable Cable (D-Sub 25 pins)  
Rack-mount Kit  
Users Manual  
If any of these pieces are missing or are damaged, please contact your  
dealer immediately.  
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Fast EtherHub Installation Manual  
Hardware Description  
The Front Panel  
The front panel contains the 8/ 12 Shielded Twisted-Pair (STP) ports,  
one uplink port, and LED indicators.  
Shielded Twisted- Pair (STP) ports  
Use any one of the STP ports for connection to a 100BASE-TX node  
using Category 5 UTP cabling. Each of these ports provides 100Mbps  
bandwidth for connection to a workstation or server.  
UPLINK port  
The uplink port provides cascading capabilities to a second  
100BASE-TX Fast Ethernet hub (if the hub is not stacked).  
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Fast EtherHub Installation Manual  
LED indicators  
The front panel LED indicators help you monitor the status of each port  
and connected segments. There are 4 different LEDs on the front panel;  
including power (PWR), collision (COL), LINK/ ACTIVITY and ERROR.  
This table lists the LEDs and their respective functions.  
LED Function  
Power (PWR)  
Color  
Description  
Green Lit: Power On  
Unlit: Power Off  
Collision (COL)  
Amber Lit: Data collision occurred  
LINK/ ACTIVITY  
Green Lit: Indicates the adapter is  
connected to the hub  
Blinking: Receiving data  
ERROR  
Yellow Flashing: Data jabber or error  
Lit: Indicates partition and  
isolation of port  
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Fast EtherHub Installation Manual  
The Rear Panel  
The rear panel of the hub contains the power socket , 2 D-Sub  
connectors (25 pins) and air fans.  
Power Socket  
The power socket accepts AC power of 100 - 240V at 50 - 60 Hz.  
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Fast EtherHub Installation Manual  
HARDWARE INSTALLATION  
Quick Installation Procedure  
1.  
2.  
Place the hub on a smooth surface or mount it on a rack.  
Connect power cord to hub and  
plug in.  
3.  
Connect workstations to hub  
using Category 5 UTP cabling.  
? Plug an RJ-45 connector into any port on the hub (other than  
the Uplink port), and plug the other end into the RJ-45 port on the  
workstations Fast Ethernet card. Distance between the hub and  
the workstation can be no more than 100 meters.  
4. Connect each device (up to 8/ 12) on your network using the process  
described in Step 3.  
? Make sure you have the correct wiring  
To reliably operate your network at 100Mbps, you must use  
Unshielded Twisted-Pair (UTP) Category 5, or better, Data Grade wire.  
While Category 3 or 4 wire may initially seem to work, it will soon  
cause data loss.  
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Fast EtherHub Installation Manual  
Select an Appropriate Location  
A good location is at or near the center of all the computers you want to  
link, close to the trunk segment and the other devices you want to  
connect, and near a convenient power outlet.  
? The cable route should not be near any power lines.  
After you have decided on a particular location, you can place the hub  
on the top of a table or a shelf, or mount it on a rack.  
You may mount the hub on any EIA standard size 19-inch mounting  
rack. First attach the supplied mounting brackets onto the sides of the  
hub with screws. Afterwards, secure the hub onto the rack by screwing  
on the mounting brackets.  
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Fast EtherHub Installation Manual  
Setting Up 100BASE-TX Stackable Hubs  
1.  
Put the 100BASE-TX stackable hub on the flat surface.  
? Ensure the power is off before stacking the hub.  
Attach the power cord and turn on power to the hub.  
2.  
3.  
Connect one end of the D-Sub (25 pins) stack cable to the OUT  
port on the first hub and the other end to the IN port on the next  
hub in the stack.  
? Do not connect OUT to OUT or IN to IN port on different hubs.  
4.  
5.  
Screw on the D-Sub (25 pins) connectors if necessary.  
Repeat steps 2-3 until all hubs are combined together in the stack.  
You should have a simple chain starting at the OUT port on the  
first hub, and ending at the IN on the last hub. You can stack up  
to 4 hubs in this manner. Note that a stack acts as a single repeater  
set.  
?The hubs backplane ports allow cascading only up to 4 hubs.  
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Fast EtherHub Installation Manual  
CONFIGURATION  
Standard-Alone  
The configuration of a simple stand-alone hub is illustrated as below.  
The maximum distance between the hub and the workstation is 100  
meters.  
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Fast EtherHub Installation Manual  
Uplink Multiple Hubs  
If you want to connect more than 8/ 12 ports, you can use the uplink  
port to connect to another hub. In compliance with the IEEE802.3u  
Class II specification, two repeaters can be cascaded using 5 meters of  
cable in a single collision domain.  
1.  
Connect a Category 5 UTP cable to the UPLINK port (Port 8/ 12)  
on the first hub.  
2.  
Connect the other end of the UTP cable to any of Ports 1 - 8/ 12 on  
the second hub (i.e., do not connect it to the UPLINK port on the  
second hub).  
? You do not need crossover cable if you use the uplink port.  
? Do not connect the uplink port (Port 8/ 12) on first hub to the  
uplink port (Port 8/ 12) on the second hub.  
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Fast EtherHub Installation Manual  
Stacking Multiple Hubs  
The 100BASE-TX stackable hub comes with stackable backplane port  
for cascading up to 4 hubs. As your network grows, this stackable  
feature allows you to add additional units for expansion. Depending on  
the models used, you will be able to stack up to 32/ 48 ports. Note the  
hubs follow Class I repeater standards when stacked.  
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Fast EtherHub Installation Manual  
TROUBLESHOOTING  
This chapter contains information to help you solve problems. If these  
hubs are not functioning properly, make sure they were set up  
according to instructions in this manual.  
If the hubs dont connect to the network:  
Check the LINK/ ACTIVITY LED lights on the front panel.  
If the LINK/ ACTIVITY LED isn t lit, check all connections at the  
adapter and the hub. Make sure the adapter drivers are loaded.  
Try another port on the hub.  
Make sure the cable is installed properly.  
The network cable must be securely attached at all connection points. If  
the cable is properly attached but the problem persists, try a different  
cable.  
Turn off the unit s power, wait a few seconds, and turn it back on.  
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Fast EtherHub Installation Manual  
Other Important Tips  
Make sure no more than 100 meters of cable are used between the  
hub and the desktop.  
Verify that the cabling type used is correct. (Category 5 UTP cable)  
Make sure the network adapter cards installed in the workstations  
and cable connections are in good working condition.  
Hubs connected via the backplane ports cannot be cascaded via the  
uplink port. When cascading hubs, limit the cascade to two hubs, and  
limit the interhub cabling to 5 meters. In a two-repeater topology, the  
maximum network diameter between end nodes is 205 meters.  
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Fast EtherHub Installation Manual  
PRODUCT SPECIFICATIONS  
Standard  
100BASE-TX UTP ports  
Uplink port  
IEEE802.3u, 100BASE-TX Class I and II repeater  
8/ 12  
Hub port # 8/ 12  
Cable Distance  
5 meters for repeater to repeater  
100 meters for repeater to station  
STP/ UTP Category 5 wiring, 100-ohm impedance  
32/ 48 ports in class I stackable mode  
Power (PWR) - Green  
Cabling  
Expandability  
LED indications  
Collision (COL) - Amber  
8/ 12 Partition LEDs - Yellow  
8/ 12 Link/ Activity LEDs - Green  
0° - 55°C  
Operating Temperature  
Operating Humidity  
Power Consumption  
Dimensions  
5% - 95%  
2.3A max at 100VAC, 0.95A at 240VAC  
435 x 210 x 42 mm  
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Fast EtherHub Installation Manual  
EMI Warning  
FCC Class A Certification  
This device complies with Part 15 of the FCC Rules. Operation is  
subject to the following conditions:  
1. This device may not cause harmful interference, and  
2. This device must accept any interference received, including  
interference that may cause undesired operation.  
Warning: This equipment generates, uses, and can radiate radio  
frequency energy and, if not installed and used in accordance with the  
instruction manual, may cause interference to radio communications.  
It has been tested and found to comply with the limits for a Class A  
digital device pursuant to Subpart B of Part 15 of FCC Rules, which  
are designed to provide reasonable protection against such interference  
when operated in a commercial environment. Operation of this  
equipment in a residential area is likely to cause interference, in which  
case the user, at his own expense, will be required to take whatever  
measures are required to correct the interference.  
You may use 100Category 5 unshielded twisted-pair (UTP) or 100Ω  
Category 5 shielded twisted-pair (STP) cable for RJ-45 connections.  
Warnings 1. Wear an anti-static wrist strap or take other suitable measures to prevent  
electrostatic discharge whenever handling this equipment.  
2. When connecting this hub to a power outlet, connect the field ground lead on the tri-  
pole power plug to a valid earth ground line to prevent electrical hazards.  
3. The connectors are not for telephone system use.  
In order to maintain compliance with the limits of a Class A digital device,  
Accton requires that you use a quality interface cable when connecting to this  
device. Changes or modifications not expressly approved by Accton could  
void the user’s authority to operate this equipment. Suggested cable type is:  
Note:  
Twisted-pair for RJ-45 connections: 100BASE-TX  
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Fast EtherHub Installation Manual  
CE Mark Declaration of Conformance  
This is to certify that this product complies with ISO/IEC Guide 22 and  
EN45014. It conforms to the following specifications:  
EMC: EN55022(1988)/CISPR-22(1985)  
EN60555-2(1987)  
class B  
class A  
IEC 1000-4-2(1995)/IEC801-2(1991) 4kV CD, 8kV AD  
IEC 1000-4-3(1995)/IEC801-3(1984) 3V/m  
IEC 1000-4-4(1995)/IE8C01-4(1988) 1kV - (power line)  
0.5kV - (signal line)  
This product complies with the requirements of the Low Voltage  
Directive 73/23/EEC and the EMC Directive 89/336/EEC.  
Safety Compliance  
Underwriters Laboratories Compliance Statement  
Important! Before making connections, make sure you have the correct  
Cord Set. Check it (read the label on the cable) against the following  
specification list.  
Operating  
Voltage  
Cord Set Specifications  
120 Volts  
UL Listed/CSA Certified Cord Set  
Minimum 18 AWG  
Type SVT or SJT three conductor cord  
Maximum length of 15 feet  
Parallel blade, grounding type attachment plug rated 15A, 125V  
The unit automatically matches the connected input voltage. Therefore,  
no additional adjustments are necessary when connecting it to any  
input voltage within the range marked on the rear panel.  
Do not plug a phone jack connector into any of the RJ-45 ports.  
This may damage the hub.  
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Warranty  
Accton warrants to the original owner that the product delivered in this package will be  
free from defects in material and workmanship for the lifetime of the product. For the  
warranty to apply, you must register your purchase by returning the registration card  
indicating the date of purchase and including proof of purchase. There will be a minimal  
charge to replace consumable components, such as fuses, power transformers, and  
mechanical cooling devices. The warranty does not cover the product if it is damaged in  
the process of being installed. Accton recommends that you have the company from  
whom you purchased this product install it.  
THE ABOVE WARRANTY IS IN LIEU OF ANY OTHER WARRANTY, WHETHER  
EXPRESS, IMPLIED OR STATUTORY, INCLUDING BUT NOT LIMITED TO ANY  
WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR  
ANY WARRANTY ARISING OUT OF ANY PROPOSAL, SPECIFICATION OR SAMPLE.  
ACCTON SHALL NOT BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES.  
ACCTON NEITHER ASSUMES NOR AUTHORIZES ANY PERSON TO ASSUME FOR IT  
ANY OTHER LIABILITY.  
Copyright  
Copyright 1997 by Accton Technology Corporation. All rights reserved. Product  
specification are subject to change without notice. All trademarks or brand names are  
properties of their respective companies.  
Disclaimer  
The publisher assumes no responsibility for errors that may appear in this  
document, nor does it make any commitment to update information it contains.  
All brand and product names mentioned are trademarks or registered  
trademarks of their respective companies.  
For warranty information:  
Accton Technology Corporation, International Headquarters  
No. 1, Creation Rd. III, Science-based Industrial Park, Hsinchu 300, Taiwan, R.O.C.  
Phone: 886-3-5770-270 Fax: 886-3-5770-267 BBS: 886-3-5770-654  
18  
 
EH3008C  
EH3012C  
E0797-R01  
 

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