Paradyne 3150 Operator's Manual page 108

8. Testing
Payload Loopback (PLB)
The Payload Loopback command (PLB) loops the received signal on the network
interface back to the network. The signal is looped back as close to the DTE port
as possible (after it has passed through the framing circuitry of the CSU). Framing
CRCs and BPVs are corrected.
Procedure
To perform a Payload loopback:
8-8
1. From the top-level menu screen, select Test.
2. From the Test screen, select Lpbk.
Test:
Rlpbk Lpbk
F2
F1
3. From the Loopback screen, select PLB.
Loopback:
Abort LLB
F2
F1
Test Started appears on Line 2. If a Payload 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 8-2, Valid Loopback
combinations).
March 2001
Ptrns
F3
PLB
F3
Combinations, for valid loopback test
3150-A2-GB24-10