Installation Manual

Testing the Router’s Ports

The following tests require loopback connectors. The type of loopback

connectors depends on which ports are in use and need testing. See

illustrations and part numbers under “Loopback Connectors” (page

A-20).

To test a WAN port:

1. Detach the router’s power cord.

2. Detach the network connection and attach a loopback connector to

each WAN port being tested.

3. Reattach the router’s power cord.

4. If the Net Fail LEDs for the tested port light, the port is faulty.

Replace the router. Any other ports that test OK may be usable in

the meantime.

To test a LAN port (802.3/Ethernet or 802.5/token ring):

1. Set the

XCVR Signal Polling parameter to ‘‘Active’’ for the circuit on

the LAN port to be tested. To access this parameter, use the

Configuration Editor from the console, select item 4 (‘‘Circuits’’),

select the desired LAN port, and specify the Circuit Type parameter.

The console then displays the XCVR Signal Polling parameter. (For

information on the XCVR Signal Polling parameter, refer to the

Operator’s Reference.).

2. Detach the router’s power cord.

3. Detach the network connection and attach an AUI loopback

connector to the port being tested.

4. Reattach the router’s power cord.

5. If the Net Fail LED for the tested port lights, the port is faulty.

Replace the router. Any other ports that test OK may be usable in

the meantime.

Troubleshooting

Diagnostic Tests

3-11