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Starting a Data Channel Loopback
"
3166-A2-GB20-20
The Data Channel Loopback command (DCLB) loops the data received from the
network interface, for all DS0 channels allocated to Port 1, back to the network.
The loopback occurs after the data passes through the port circuitry but before it
is sent out the data port.
DSU
CSU
DCLB
Procedure
To perform a Data Channel loopback:
1. From the top-level menu screen, select Test.
2. From the Test screen, select Lpbk.
Test:
Rlpbk Lpbk
F1
3. From the Loopback screen, press the
appears on the screen.
4. Select DCLB.
Loopback:
PLB
RLB
F1
Test Started appears on Line 2. If a Data Channel loopback is already in
progress, the Already Active message appears. If an invalid combination
of loopbacks is in progress, the error message Invld Test Combo appears
(see
Table 4-7
for valid loopback test combinations).
March 1999
NETWORK
INTERFACE
98-16103
Ptrns
F3
F2
key until the DCLB selection
DCLB
F3
F2
Monitoring and Testing
4-23
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