Sierra Wireless DART 200 CDPD Modem - Manual (Page 153)

DART 200 CDPD Modem User’s Guide F DART AT Command Set
PN1197-00 Revision 1.0 F-9
Table F-2. Commands beginning with ampersand (&)
&C Set DCD Operation
For serial ports, this command defines the usage of the data carrier detect (DCD) signal at the DART’s
RS-232 interface. This signal can be tested by the MAS application to determine if the specified
condition is true or false. Refer to Chapter 8, Application Programming, Data and control interface,
for more information.
Format:
AT&C0 DCD is always active
AT&C1 DCD follows the state of the Connection Established condition (default)
AT&C3 DCD follows the state of RF in Range
AT&C4 DCD follows the state of Registration
NOTE:
When running in SLIP mode in a Windows/95 environment an &C1 value is required
Result codes:
OK Valid argument
ERROR Invalid argument
&D Set DTR Operation
For serial ports, this command defines the DART’s response to the state of the data terminal ready
(DTR) signal at the RS-232 interface. See Chapter 8, Data forwarding, and Data and control interface.
For both the &D1 and &D2 options any data remaining in the packet buffer is transmitted when the
DTR transition is accepted.
NOTE:
If &D1 or &D2 is specified auto-answer is disabled if DTR is or becomes inactive.
Format:
AT&D0 DTR is ignored (default)
AT&D1 Enter command state upon accepting an active to inactive DTR transition.
When this DTR function completes successfully the MAS receives an OK
response
AT&D2 Enter command state and terminate the connection upon accepting an active to
inactive DTR transition.
This is equivalent to executing an escape followed by an ATH2 command.
When this DTR function completes successfully the MAS receives a NO
CARRIER response
Result codes:
OK
Valid argument
ERROR Invalid argument