Sierra Wireless AirLink RV50 Series User Manual page 459

Table D-11: Standard (Hayes) AT Commands
Command
+++
&C
Rev 1 Dec. 17
The following table contains Hayes commands supported on AirLink gateways.
Description
AT escape sequence (not preceded by AT)
If a serial terminal is in a data mode, typing this sequence on that serial terminal causes the
terminal to re-enter AT command mode. There must be an idle time on the serial port before
and after the sequence. The idle time is set by the value in S50.
After you type the AT escape sequence, the terminal remains in AT command mode for
15 seconds before it automatically leaves AT command mode and returns to the previous
data mode.
Note: The "+" is ASCII character 0x2B.
Note: The detection of this sequence is disabled if DAE=1.
Query or set Data Carrier Detect (DCD) mode.
DCD is a hardware signal that notifies the software that the device is communicating with
another device.
AT&C? to query
AT&Cn to set
n=0—Always assert DCD
•
n=1—Assert DCD enable when network is ready (default)
•
Note: Do not use an equal sign (=) when issuing the command.
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AT Commands
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