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DCP Operation
3-493910-A2-GN32-30 November 1996
F1
Test:Local Loop
Started
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.
The
message
Started appears on the LCD, and the Test LED lights for the duration of the test. If
Invalid Command 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, T
est T
imeout
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 T
est branch, press the
key
. To exit and return to the
Top-Level menu, press the
key
.
Rem Digital Loop
This test is not available when using TMp modulation or Remote mode.
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.
Figure 3-5. Remote Digital Loopback