Toshiba Libretto U100 - Manual (Page 210)

C-8 User’s Manual
AT Commands
&Gn V.22bis guard tone control
This command determines which guard tone, if any, to transmit while
transmitting in the high band (answer mode). This command is only used in
V.22 and V.22bis mode. This option is not used in North America and is for
international use only.
Result Codes:
OK
n=0,1,2
ERROR
Otherwise
&Kn Local flow control selection
Result Codes:
OK
n=0,3,4
ERROR
Otherwise
&Pn Select Pulse Dial Make/Break Ratio (WW)
Result Codes:
OK
n=0,1,2
ERROR
Otherwise
&Tn Self-test commands
These tests can help to isolate problems if you experience periodic data
loss or random errors.
Result Codes:
OK
n=0
CONNECT
n=1
ERROR
Otherwise
&G0 Guard tone disabled (default).
&G1 Sets guard tone to 550 Hz.
&G2 Sets guard tone to 1800 Hz.
&K0 Disable flow control.
&K3 Enable CTS/RTS flow control (default).
&K4 Enable XON/XOFF flow control.
&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.
&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.