Toshiba V.92 - Manual (Page 66)

66 AT Commands
AT command formats
5.375 x 8.375 ver 2.4.0
&Dn Data Terminal Ready (DTR) control
This command interprets how the modem responds to the
state of the DTR signal and changes to the DTR signal.
Result Codes:
&F Load factory settings
This command loads the configuration stored and
programmed at the factory. This operation replaces all of the
command options and the S-Register settings in the active
configuration with factory values.
&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 online
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 online
data mode, the modem disconnects (default).
&D3 Reset the modem on the on-to-off DTR
transition.
OK n=0,1,2,3
ERROR Otherwise
&F Recall factory setting as active configuration.