HP 3162 manual Local Loopback Tests, Sending a V.54 or Ansi FT1 Activation/Deactivation Sequence

Monitoring and Testing

Sending a V.54 or ANSI FT1 Activation/Deactivation Sequence

"Procedure

To send a V.54 or ANSI FT1 activation or deactivation loopback sequence to the far-end DSU/CSU:

1.From the Main Menu screen, select Test.

2.From the Test screen, select Sync Data Port Tests.

3.In the Port field (near the top of the screen), enter either 1 or 2 depending on the synchronous data port that you want to test.

4.In the Send V.54 Loopback field or the Send FT1 Loopback field (under Remote Loopbacks), enter either Up or Down depending on the type of sequence that you want to send.

5.For the appropriate command (Send V.54 Loopback or Send FT1 Loopback), select Send.

Local Loopback Tests

The Local Loopback tests enable you to conduct circuit testing and fault isolation for the digital line. The supported local loopback tests are:

HLine Loopback (LLB)

HPayload Loopback (PLB)

HDTE Loopback (DLB)

HRepeater Loopback (RLB)

HData Channel Loopback (DCLB)

HData Terminal Loopback (DTLB)

NOTE:

DLB is not available when the DTE Drop/Insert (DSX-1) interface is disabled.

The Line Loopback test can be activated and deactivated in response to commands received over the network interface. The Network Initiated LLB configuration option controls whether the DSU/CSU responds to the commands transmitted on the network interface to initiate LLBs (see Appendix C, Configuration Options).

The Network Initiated DCLB configuration option controls whether the DSU/CSU responds to inband V.54 commands to initiate DCLB for that port (see Appendix C, Configuration Options).

Local loopback tests can be aborted (Abort Command) at any time.

No more than two local loopbacks can be active at any one time. An additional restriction prohibits certain loopbacks from running at the same time. Valid loopback combinations are identified by YES in Table 5-10.

5-20 August 2000 3162-A2-GB20-40