Toshiba Portege 3500 User Manual page 203

User's Manual
&P0
Selects 39% - 61% make/break ratio at 10 pulses
per second.
&P1
Selects 33% - 67% make/break ratio at 10 pulses
per second.
&P2
Selects 33% - 67% make/break ratio at 20 pulses
per second.
Result Codes:
n = 0, 1, 2
OK
Otherwise
ERROR
These tests can help to isolate problems if you experience
periodic data loss or random errors.
&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 off-line.
Result Codes:
n = 0
OK
n = 1
CONNECT
Otherwise
ERROR
AT Commands
H-13