Paradyne KeepInTouch 3766 User Manual page 52

AT Command Set and S-Registers
Table 4-1. AT Command Reference (11 of 18)
AT
Command Description
&C n CD CONTROL
This command controls the CD (Carrier Detect) signal.
&C0
&C1
&D n DTR CONTROL
This command controls what actions are taken by the
modem based upon the DTR (Data Terminal Ready) signal.
&D0
&D1
&D2
&D3
NOTE: DTR has to remain off for a minimum amount of time
before the modem will perform any of the actions for this
command. This minimum time period is determined by the
setting of S-Register S25. If DTR is off for less than that time
period, no action is taken. See S25 for more information.
&F LOAD FACTORY SETTINGS
This command loads the factory settings for the AT
commands and S-Registers into the Active Profile area.
NOTE: This command does not reset the )C n command
option to its factory setting.
4-12
Issue 2
State of carrier from the remote modem is ignored.
CD is always on. (Also known as Forced On.)
State of carrier from the remote modem is
tracked. CD reflects the state of the received
carrier. (Standard RS232 operation.)
The modem ignores DTR and assumes it is always
active.
The modem switches from Data mode to Command
mode when an on-to-off transition of DTR is
detected. (An ATO returns the modem to Data
mode.)
The modem hangs up and switches to Command
mode when an on-to-off DTR transition is
detected. Auto-answer is disabled if DTR is low.
An on-to-off transition of DTR re-initializes the
modem but does not perform a complete power
reset.
May 1995