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Testing
5-3
7984-A2-GB20-10
February 1999
Line Loopback
Line Loopback (LLB) loops the received signal on the network interface back to
the network without change.
CAP
DSL
Port
DSX-1
Port
CAP T1
LIU
FramerFramerTransceiver
AIS
98-16112
" Procedure
To run a Line Loopback:
1. Position the cursor at the Start command next to Line Loopback on the
Network Tests screen.
2. Press Enter.
The Start command is changed to Stop.
3. To manually stop the test, verify that the cursor is positioned at the Stop
command.
4. Press Enter.
Line Loopback cannot be started when a Repeater Loopback, DTE Loopback,
Remote DCLB, network-initiated Line Loopback, or Telco-initiated tests are in
progress.