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COMSPHERE 3800Plus Modems
7-4 October 1998 3980-A2-GB30-40
Rem Digital Loop
Rem Digital Loop performs a remote digital loopback
(ITU-T V.54 Loop 2), Figure 7-2. This test can verify the
integrity of the local modem, the communications 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
online and in Synchronous or Asynchronous Direct mode
and, if set for V.34 modulation, must not be in
Asymmetric Rate mode.
To access Rem Digital Loop from the Test branch,
make the following selections:
F1
Test :
Rem_Digital_Loop
F2
F3
Press the key until Rem Digital Loop appears.
Press any function key to start this test.
F1
Test : Remote Loop
Started
F2
F3
The message Started appears on the LCD, and the Test
LED lights for the duration of the test.
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 8, Configure Branch.
To exit this function and remain in the Test branch,
press the
key. To exit and return to the Top-Level
menu, press the
key.
AT Command Equivalent
The AT command for Remote Loopback is &T6.
Figure 7-2. Remote Digital Loopback