COMSPHERE 392xPlus Modems
3-58 November 1996 3920-A2-GN31-30
NOTE
The test delays 15 to 30 seconds to allow any outstanding network
management messages to propagate 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
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, 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.
•Using Remote mode.
•V.54 configuration option is enabled.
•
Using V
.34 modulation with the Aysmmetric Rate configuration option 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.
Figure 3-5. Remote Digital Loopback