Paradyne 316x manual Remote Loopback Tests, Sending a Line Loopback Up or Down, For Networks

ACCULINK 316x DSU/CSU

When you select T1 Interface Loopbacks and Patterns, the subsequent screen displays the Remote Loopback, Local Loopback, Send, Monitor, and Abort operations that are available to run on the T1 interface, as shown in Figure 4-2. Likewise, from one of the port selections, a similar screen appears with the same operations that can run on the selected port, also shown in Figure 4-2. All the local loopback tests are mutually exclusive with the send pattern and remote loopback tests. If you attempt to run a test that is already active or an invalid local loopback test or test pattern combination (see Tables 4-2 and 4-3), an error message is displayed.

The Lamp test is not available from the async terminal interface.

Remote Loopback Tests

The Remote Loopback tests allow you to troubleshoot your circuit by sending to a far-end DSU/CSU the following:

For Networks,

•Line loopback up code for 10 seconds (LLBUP)

•Line loopback down code for 10 seconds (LLBDN)

For Channels,

•V.54 activation sequence to initiate a V.54 Loop 2 (54UP)

•V.54 deactivation sequence to terminate a

V.54 Loop (54DN)

•ANSI T1.403 (Annex B) activation sequence to initiate a DCLB on the remote device (FT1UP)

•ANSI T1.403 (Annex B) deactivation sequence to terminate a DCLB on the remote device (FT1DN)

You cannot perform remote loopbacks if any of the local loopbacks are active. If you attempt to do so, the error message Invalid Test Combo appears.

Sending a Line Loopback Up or Down

To send a Line Loopback Up or Down code on the network to a far-end DSU/CSU,

1.Press F2 to select Test from the top-level menu screen.

DSU ESF

Stat Test Cnfig

F1 F2 F3

2. From the Test screen, press F1 to select Rlpbk.

Test:

Rlpbk Lpbk Ptrns

F1 F2 F3

3.From the Rem Loopback screen, press F1 to select LLBUP (Line Loopback Up), or press F2 to select LLBDN (Line Loopback Down).

Rem Loopback:

LLBUP LLBDN 54UP

F1 F2 F3

The Local Loopback code is sent up or downstream to the far-end DSU/CSU for

10 seconds. During this time, Sending appears on Line 2 of the LCD, followed by Command Complete when 10 seconds have elapsed.

You can press any function key to restore the Rem Loopback screen without affecting transmission of the loopback code.

4-4 December 1996 3160-A2-GB22-10