COMSPHERE 392xPlus Modems
3-60
November 1996
3920-A2-GN31-30
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.
NOTE
A TMp tributary cannot perform a local digital loopback test.
Figure 3-6. Local Digital Loopback
To access Loc_Digital_Loop from the Test branch, make the following selections:
F1
Test:
Loc_Digital_Loop
F2
F3
Press the
key until Loc_Digital_Loop appears. Press any function key to start this test.
F1
Pick Test Port
>
Port1
Port2
F2
F3
If the mux is enabled, select the appropriate port by pressing the corresponding function key. Press
the
key to scroll other ports into view.
