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DCP Operation
3-573920-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 T
est branch, make the following selections:
F1
Test:
Loc_Analog_Loop
F2
F3
Press the
key until Loc Analog Loop appears. Press any function key to start this test.
F1
Test:Local Loop
Started
F2
F3