Local analog loopback, Loc analog loop – Paradyne 392xPLUS User Manual

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DCP Operation

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3920-A2-GN31-30

November 1996

Loc Analog Loop

This test is not available when using V.34 modulation in Multiport mode.

Loc Analog Loop performs a local analog loopback (CCITT V.54 Loop 3), Figure 3-4, 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.

NOTE

If you are performing a Local Analog Loop test on a TMp modulation
that is running a test pattern with a constant flow of data, you must
toggle the RTS switch off and then on to allow the modem to train
up.

Figure 3-4. Local Analog Loopback

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

Test:
Loc_Analog_Loop

Press the

key until Loc Analog Loop appears. Press any function key to start this test.

Test:Local Loop
Started