Toshiba V.90 - Manual (Page 47)

AT Commands
AT command formats
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Result Codes:
&Tn Self-test commands
These tests can help to isolate problems if you experience periodic
data loss or random errors.
Result Codes:
&V View active configuration and stored profile
This command is used to display the active profiles on your
computer’s monitor.
For example:
OK n=0 to 2
ERROR Otherwise
&T0 Abort. Stops any test in progress.
&T1 Local analog loop. This test verifies modem operation, as
well as the connection between the modem and
computer. Any data entered at the local DTE is
modulated, then demodulated, and returned to the local
DTE. To work properly, the modem must be offline.
OK n=0
CONNECT n=1
ERROR Otherwise
&V View active file
Option Selection AT Command
Comm Standard Bell B
Command Char Echo Enable E