optic connection between two hubs can be provided
through fiber optic transceivers (TN model E-FRL-MC01)
connected to the AUI port.
* Do not cascade hubs directly together with an AUI cable.
* When cascading hubs via twisted pair, a cross over cable
is required (see section on cascading hubs).
* Be sure your network configuration does not exceed the
maximum distance and MAU limitations set forth by the
10BaseT standards. Refer to IEEE 802.3 specifications or
check with a professional network installer.
* When connecting your network devices to the hub via
twisted pair cable, the maximum twisted pair length is 100
meters (330 feet) and is equal to one segment. Use a
straight through cable assembly.
* Choose a centrally located area for the hub installation.
Separate Data and Voice transmission lines. Use only a
dedicated cable, per device to prevent crosstalk. Utilize
level 4 cable or better.
* The text of this manual assumes that the reader is familiar
with network systems in general.
Choosing an Installation Location
The installation location you choose must have the following:
* An AC power outlet (100-240 VAC, 50-60 Hz) for the hub’s
power cord connection.
* Suitable rack space to mount the hub for proper ventilation.
Troubleshooting Your Installation
The first step after the wiring has been installed is to con-
nect two devices (such as the file server and a workstation)
to the hub to see if they will communicate with each other.
Use your operating system software to locate each device.
When you have verified that they communicate correctly,
you can continue to connect other network devices to the
hub.
If the two network devices do not communicate, or any addi-
tional device after the initial test, follow the procedures listed
below.
1) Check the LINK indication on the front panel. If not lit,
LINK has not been established.
2) Bypass the building wiring and test directly using test
cables between the hub, workstation and server.
3) Verify that the individual devices are Ethernet compatible
and can communicate with each other.
4) Examples of common internal wiring problems found:
* The internal (building or premise) wiring is not prop-
erly configured (punch down blocks, wall jacks, patch
cables).
* Flat or “silver satin” telephone wire used for patch
and line cords. These may have reverse pinning,
replace and use level 4 grade cable.
* The maximum distance from a hub to network
device cannot exceed 100 meters (330 feet).
5) Examples of common network problems:
