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COMSPHERE 3900 Series Modems
3-50 November 1996 3910-A2-GN32-30
To access Rem Digital Loop from the T
est 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
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.
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
.
Loc Digital Loop
Loc Digital Loop is issued by a local modem and forces it to loopback any data received from the
remote modem (Figure 3-6). (This test operates the same as a CCITT V.54 Loop 2 except it is
issued at your modem.) This is useful if a remote modem is incapable of initiating a remote digital
loopback from its location. For this test to operate properly, the modems must be operating at
the same rate and in Synchronous or Asynchronous Direct mode.
Figure 3-6. Local Digital Loopback