8. Testing

5.From the DCLB screen, press the Function key for the port for which you want to perform the data channel loopback. Use the scroll keys, if necessary.

Loopback: DCLB

Prt1 Prt2 Prt3

F1 F2 F3

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 8-2, Valid Loopback Combinations, for valid loopback test combinations).

Data Terminal Loopback (DTLB)

The Data Terminal Loopback command (DTLB) loops the data received from the selected port, for all DS0 channels allocated to the port, back out of the port. This loopback occurs after the data passes through the port circuitry but before it reaches the T1 framer.

DTE

(DSX-1)

DSU CSU

ALL 1s

NETWORK INTERFACE

DTLB

DTLB

PORT 2 PORT 1

496-14314-02

Procedure

To perform a Data Terminal loopback:

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

2.From the Test screen, select Lpbk.

Test:

Rlpbk Lpbk Ptrns

F1 F2 F3

3.From the Loopback screen, press the key until the DTLB selection appears on the screen.

8-14

March 2001

3160-A2-GB24-10

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Paradyne 3161, and 3165-A4, 3160-A4 manual Data Terminal Loopback Dtlb
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