Verilink SCC 2130 (880-503282-001) Product Manual Manual de usuario descargar pdf (Pagina 68)

Diagnostics

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Verilink SCC 2130 User Manual

With a loopback plug in the network port, any customer equipment

connected to the SCC 2130 should see a loopback condition. If the

customer equipment is capable of reporting errors, it should

indicate that no errors are being received.

A T1 loopback plug can be made by taking a male RJ-45 connector

and placing two short jumper wires where a cable would normally

go. One jumper is placed from pin one to pin five, the other jumper

connects pin two to pin four. See Figure 5-5 for a drawing of a T1

loopback plug.

NOTE:

When using a T1 loopback plug it may be necessary to

temporarily change the timing selection in the IDCSU. If the

IDCSU is set to recover network clock it will be trying to

recover a clock it is trying to recover, the clock frequency will

drift. For this test, set the IDCSU clock source to Internal.

Figure 5-5 T1 Loopback Plug

RJ -45

Cable Side

Connector

245

RJ-45 plug held with plastic latching tab unseen at bottom

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Verilink SCC 2130 (880-503282-001) Product Manual Manual de usuario Pagina 68