Paradyne 3160-A2-GB21-50 Starting a Data Channel Loopback, Starting a Data Terminal Loopback

ACCULINK 316x DSU/CSU

Starting a Data Channel Loopback

The Data Channel Loopback command (DCLB) loops the data received from the network interface, for all DS0 channels allocated to the selected port, 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
DTE		NETWORK
(DSX-1)		INTERFACE
DCLB	DCLB

ALL 1s	ALL 1s
PORT 2	PORT 1	496-14315-02

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 Ptrns

F1 F2 F3

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

4.Select DCLB.

Loopback:
DLB	RLB	DCLB
F1	F2	F3

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 4-8for valid loopback test combinations).

Starting a Data Terminal Loopback

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.

	DSU	CSU
		ALL 1s
DTE			NETWORK
(DSX-1)			INTERFACE

DTLB	DTLB
PORT 2	PORT 1	496-14314-02

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

4-20 January 1997 3160-A2-GB21-50