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Maintenance
4-20
3160-A2-GB21-80
March 1999
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 top-level menu screen, select Test.
2. From the Test screen, select Rlpbk.
F1
Test:
Rlpbk Lpbk Ptrns
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).
F1
Rem Loopback:
LLBUP LLBDN 54UP
F2
F3
The Line Loopback sequence 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.