Toshiba Satellite 2430 User Manual page 180

Zn Recall stored profile
&Cn Data Carrier Detect (DCD) control
&Dn DTR control
Satellite 2430 Series
The modem performs a soft reset and restores (recalls) the
configuration profile according to the parameter supplied. If no
parameter is specified, zero is assumed. Either Z0 or Z1 restores
the profile.
Result Codes:
OK
n=0,1
ERROR Otherwise
Data Carrier Detect is a signal from the modem to the computer
indicating that a carrier signal is being received from a remote
modem. DCD normally turns off when the modem no longer
detects the carrier signal.
The state of the carrier from the remote modem is
&C0
ignored. DCD circuit is always on.
&C1 DCD turns on when the remote modem's carrier signal
is detected, and off when the carrier signal is not
detected (default).
Result Codes:
OK
n=0,1
ERROR Otherwise
This command interprets how the modem responds to the state
of the DTR signal and changes to the DTR signal.
&D0 Ignore. The modem ignores the true status of DTR and
treats it as always on. This should only be used if your
communication software does not provide DTR to the
modem
&D1 If the DTR signal is not detected while in on-line data
mode, the modem enters command mode, issues an
OK result code, and remains connected.
&D2 If the DTR signal is not detected while in on-line data
mode, the modem disconnects (default).
Reset on the on-to-off DTR transition.
&D3
Result Codes:
OK
n=0,1,2,3
ERROR Otherwise
AT Commands
H-8