Digicom 3911, 3910 operation manual Loc Analog Loop, Test LocAnalogLoop, TestLocal Loop Started

COMSPHERE 3900 Series Modems

Loc Analog Loop

Loc Analog Loop performs a local analog loopback (ITU-T- V.54 Loop 3), Figure 8-1, that verifies modem operation as well as the connection between the DTE and modem. The modem must be offline and in Synchronous or Asynchronous Direct mode to perform this test, otherwise Invalid Command appears.

Figure 8-1. Local Analog Loopback

To access Loc Analog Loop from the Test branch, make the following selections:

Test:

Loc_Analog_Loop

F1 F2 F3

Press the key until Loc_Analog_Loop appears. Press any function key to start this test.

Test:Local Loop

Started

F1 F2 F3

NOTE

For tributary modems only, the test is delayed 30 seconds to allow any outstanding network management messages to propagate upstream before the VF channel is interrupted by the test.

8-4 September 1998 3910-A2-GN32-40