Teletronics WINC900A - Manual (Page 26)

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For serial ports, the AT&C command defines the operation of the data carrier detect signal (DCD) at
the modem interface.
Format:
AT&C0 DCD always active.
AT&C1 DCD follows the state of “Connection Established”
condition, which is the default.
AT&C2 DCD always on, except momentarily at connection
disconnect.
AT&C3 DCD follows the state of the “RF in Range” condition.
&D - Set DTR Operation
For serial ports, the AT&D command defines the device's response to the state of the data terminal
ready (DTR) signal at its interface with the host computer.
Format:
AT&D0 DTR is ignored (default).
AT&D1 Enter command state upon detecting active-to-inactive
transition of DTR.
A T&D2 Closes the connection upon detecting active-to-inactive
transition of DTR. Equivalent to executing ATH2 command.
Auto-answer is disabled while DTR is inactive.
&F - Restore Factory Defaults
The AT&F command resets the modem to factory default settings.
Format:
AT&F Restore factory defaults.
&S - Set DSR Operation
For serial ports, the AT&S command defines the operation of the data set ready (DSR) signal at the
modem interface.
Format:
AT&S0 DSR is always active.
AT&S1 DSR follows the state of the “Connection Established”
condition.
AT&S2 DSR follows the state of the “Battery OK" condition.
&V - View Active Profile
The AT&V command displays the active configuration state of all registers.
Format:
AT&V View active profile.
&W - Save Active Profile
The AT&W command saves the current configuration state of all registers in non-volatile memory.
At power up, the device is set with the active profile status.
Format:
AT&W Save active profile.