Rem Digital Loop - Paradyne Comsphere 3920Plus Installation And Operation Manual

The message Started appears on the LCD, and the Test LED lights for the duration of the test. If
OtherTestActive appears on the LCD, another test is in progress. Select Abort to clear the current
test and try again. If the Test Timeout configuration option is enabled, Test Timeout appears at the
conclusion of the test. If it is disabled, the test operates until aborted. For more information on the
Test Timeout configuration option, refer to the Test section in Chapter 4. A Ring Indicate during
this test can cause errors.
To exit this function and remain in the Test branch, press the
Top-Level menu, press the

Rem Digital Loop

This test is not available when using TMp modulation, Remote mode or when the V.54
configuration option is enabled.
Rem Digital Loop performs a remote digital loopback (CCITT V.54 Loop 2), Figure 3-5. This test
can verify the integrity of the local modem, the communication link, and the remote modem. Any
data or pattern entered at the local DTE is sent to and returned from the remote modem. For this
test to operate properly, the modems must be operating at the same rate and in Synchronous or
Asynchronous Direct mode.
3920-A2-GN31-10
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.
key.
Figure 3-5. Remote Digital Loopback
April 1995
NOTE
key. To exit and return to the
DCP Operation
3-57