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Installation Manual

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Stackable Fast Ethernet Hub with

8/12 10BASE-T/100BASE-TX Ports

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.

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

Fast EtherHub Installation Manual

Package Contents

Check your package contents for the following parts:

æ8/12 port 100BASE-TX Fast Ethernet Stackable Hub

(Fast EtherHub-8se or Fast EtherHub-12se)

æPower Cord

æStackable Cable (D-Sub 25 pins)

æRack-mount Kit

æUser’s Manual

If any of these pieces are missing or are damaged, please contact your

dealer immediately.

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).

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 Color Description

Power (PWR) 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

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.

Fast EtherHub Installation Manual

HARDWARE INSTALLATION

Quick Installation Procedure

1. Place the hub on a smooth surface or mount it on a rack.

2. 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

workstation’s 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.

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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