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DataTalker Owner’s Manual
6.5.1 Loop Tests
The Loop Tests menu provides either a voice loopback or a composite link loopback that
depends on the type of link device.
Loop Tests
1 - Voice Loopback
2 - Composite Link Loopback
M - Main Menu
P - Previous Menu
Selection : _
The following messages are displayed, depending on the loopback test.
Voice Loopback Test
Voice Loop Test. If you have one voice channel, it loops to itself. If you have two voice channels,
voice channel 1 loops to voice channel 2.
Hit any key to end the test.
While the test is running, speak into the mouthpiece of the telephone connected to the
DataTalker. If you hear your voice over the speaker, the circuit is okay.
Internal DSU Test
Your internal DSU is in loopback now. The DSU loops both local and remote. To loop data exit
command mode.
To end loopback, reset the unit.
External Device Test
To perform a composite link loopback test, put your external link device into loopback.
Internal MMH2834 Test
To perform a composite link loopback test, go into the composite link configuration menu and
send the command AT&M1U to the modem. Wait for the “Connect” message, then enter q. After
the q, you can exit command mode to loop data.
To end loopback, reset the unit.