Paradyne 316x manual Sending a V.54/ANSI FT1 Activation/Deactivation, Local Loopback Tests

Maintenance

Sending a V.54/ANSI FT1

Activation/Deactivation

To send a V.54 or ANSI FT1 Activation or Deactivation loopback sequence to the far-end DSU/CSU,

1.Press F2 to select Test from the top-level menu screen.

DSU ESF

Stat Test Cnfig

F1 F2 F3

2. From the Test screen, press F1 to select Rlpbk.

Test:

Rlpbk Lpbk Ptrns

F1 F2 F3

3.From the Rem Loopback screen, press the function key that corresponds to the specific loopback test you want to perform. Use the scroll keys, if necessary

Rem Loopback:

LLBUP LLBDN 54UP

F1 F2 F3

The Rem Loop screen appears.

Rem Loop: Type

Prt1 Prt2 Prt3

F1 F2 F3

The 54UP, 54DN, FT1UP, and FT1DN commands send the requested sequence out the network interface on the DS0 channels allocated to the port you select here.

4.From the Rem Loop screen, press the desired function key to select the specific port. Use the scroll keys, if necessary.

After you select a port, the sequence is sent to the far-end DSU/CSU. During this time, Sending appears on Line 2 of the LCD, followed by Command Complete when the sequence is complete.

During the Sending message, you can press the and keys without affecting transmission of the loopback sequence.

Local Loopback Tests

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

•Line Loopback (LLB)

•Payload Loopback (PLB)

•DTE Loopback (DLB)

•Repeater Loopback (RLB)

•Data Channel Loopback (DCLB)

•Data Terminal Loopback (DTLB)

The Line Loopback and Payload Loopback commands can be activated and deactivated in response to commands received over the network interface as specified by ANSI and AT&T standards.

The Network Interface configuration options NET LLB and NET PLB control whether the DSU/CSU responds to the commands transmitted on the network interface to initiate PLBs or LLBs (see Appendix C, Configuration Options).

The data port configuration option NET DCLB controls whether the DSU/CSU responds to inband V.54 or fractional T1 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 listed in Table 4-2 are identified by YES.

3160-A2-GB22-10 December 1996 4-5