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Monitoring and Testing
5-19
3162-A2-GB20-40
August 2000
Remote Loopback Tests
The Remote Loopback tests enable you to troubleshoot your circuit by sending
the following to a far-end device:
For Networks
H Line loopback up activation sequence for 10 seconds (Line Loopback Up)
H Line loopback down activation sequence for 10 seconds (Line Loopback
Down)
For Channels
H V.54 activation sequence to initiate a V.54 Loop 2 (V.54 Loopback Up)
H V.54 deactivation sequence to terminate a V.54 Loop 2 (V.54 Loopback
Down)
H ANSI T1.403 (Annex B) activation sequence to initiate a DCLB on the remote
device (FT1 Loopback Up)
H ANSI T1.403 (Annex B) deactivation sequence to terminate a DCLB on the
remote device (FT1 Loopback Down)
You cannot perform remote loopbacks if any of the local loopbacks are active. If
you attempt to do so, the error message Invalid Test Combination
appears.
Sending a Line Loopback Up or Down
"
Procedure
To send a Line Loopback Up or Down sequence on the network to a far-end
DSU/CSU:
1. From the Main Menu screen, select Test.
2. From the Test screen, select Network & DTE Tests.
3. In the Send Line Loopback field (under Remote Loopbacks), enter either Up
or Down depending on the type of sequence that you want to send.
4. For the Send Line Loopback command, select Send.