&Dn
This command interprets how the modem responds to the state of the DTR signal
and changes to the DTR signal.
Result Codes:
&Fn
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 ac-
tive configuration with factory values.
&Gn
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.
DTR Control
Load Factory Settings
V.22bis Guard Tone Control
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