User Guide Modem 3460

3460 Fast’R
5-10
Running Diagnostic Tests
This section describes loopback, busy out, and retrain tests, which
analyze local- and remote-modem performance and the telephone line to
assist you in isolating network problems. These tests can be initiated:
• With AT commands from an attached PC or terminal
• With commands from Fast’RVu
• With commands from a Motorola network management system
IMPORTANT: Run one test at a time. Tests interrupt network data.
Table 5-3. Running Diagnostic Tests
Test Description
AT
Command
Local Analog
Loopback (LAL)
Tests local-modem transmit and receive
circuitry
AT&T1
LAL Pattern Tests local-modem circuits AT&T8
Remote Digital
Loopback (RDL)
Tests local- and remote-modem circuits
and the telephone line
AT & T 6
Local Digital
Loopback (LDL)
Tests local-modem telephone lines and
circuits.
AT & T 7
Busy Out Lets the modem appear busy to
incoming calls.
AT H 1
Retrain Lets you manually retrain the local and
remote modems
AT O 1
Terminate Terminates a test in progress AT&T0
LAL, LDL, and RDL tests using the EIA leads are not supported.
Parameters and options shown shaded gray vary by country. For your
country’s options, refer to the 3460 Fast’R Reference Guide.