Paradyne 3166 DSU, User Manual

Page: 90 / 207

Monitoring and Testing
4-22
3166-A2-GB20-20 March 1999
Starting a Repeater Loopback
The Repeater Loopback command (RLB) loops the signal being sent to the
network back to the data port. The signal is looped back as close to the network
interface as possible (after it has passed through the framing circuitry of the
DSU/CSU). Framing CRCs and BPVs are corrected.
98-15948
CSU DSU
NETWORK
INTERFACE
RLB
PORT 1
ALL 1s
Procedure
To perform a Repeater loopback:
1. From the top-level menu screen, select Test.
2. From the Test screen, select Lpbk.
F1
Test:
Rlpbk Lpbk
Ptrns
F2 F3
3. From the Loopback screen, press the key until the RLB selection
appears on the screen.
4. Select RLB.
F1
Loopback:
LLB
PLB RLB
F2 F3
Test Started
appears on Line 2. If a Repeater 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).