Lucent Technologies Host-Based Controller Modem AT Data Addendum page 14

Host-Based Controller Modem
AT Command Set
AT Command Reference (continued)
&Dn DTR Control
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 computer 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 OK result code, and remains connected.
&D2: If the DTR signal is not detected while in on-line data mode, the modem disconnects (default).
&D3: Reset modem on the on-to-off DTR transition.
Result Codes:
OK
ERROR
&Fn 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 default values.
Note: In voice mode (AT+FCLASS=8), if the AT&F command is placed on the same line as other commands, the
command line is ignored. To load factory settings in voice mode, issue AT&F by itself.
Result Codes:
OK
ERROR
&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.
&G0: Guard tone disabled (default).
&G1: Sets guard tone to 550 Hz.
&G2: Sets guard tone to 1800 Hz.
Result Codes:
OK
ERROR
&Jn Auxiliary Relay option
&J0:
&J1:
Result Codes:
OK
ERROR
14
n = 0, 1, 2, 3
Otherwise
n = 0
Otherwise
n = 0, 1, 2
Otherwise
The auxiliary relay is never closed. (Default)
NOT SUPPORTED
n = 0
Otherwise
Lucent Technologies Inc.
Data Addendum
June 15, 1998
Version 1.0