Starting a line loopback, Starting a payload loopback, Line loopback – Paradyne 3163 User Manual

Page 64: Llb), Payload loopback, Plb)

ACCULINK 3163 DSU/CSU

4-12

March 1999

3163-A2-GB20-10

Starting a Line Loopback

The Line Loopback command (LLB) loops the

received signal on the network interface back to the
network without change.

98-15946

CSU

DSU

NETWORK

INTERFACE

ALL 1s

LLB

PORT 1

Procedure

To perform a Line loopback:

1. From the top-level menu screen, select Test.

2. From the Test screen, select Lpbk.

Test:
Rlpbk Lpbk

Ptrns

3. From the Loopback screen, select LLB.

Loopback:
Abort

LLB

PLB

Test Started appears on Line 2. If a line 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 4-5

for valid

loopback test combinations).

Starting a Payload Loopback

The Payload Loopback command (PLB) loops the

received signal on the network interface back to the
network after it has passed through the framing circuitry
of the DSU/CSU. Framing CRCs and BPVs are corrected.

98-15947

CSU

DSU