Basic modes, At mode – Sierra Raven EDGE User Manual

Page 48

Data Communication and Host Modes

Rev 3.0B Feb.08

Basic Modes

AT Mode

Using a terminal connection, AT commands are used to
configure the modem, command it to do something, or query a
setting. For a full listing of the AT commands, refer to the
appendix. AceManager is a graphical user interface for most
AT Commands.

•

AT commands must always be terminated by (ASCII
character 0x0D), a carriage return (pressing enter on the
keyboard). Some may also include a new line or line feed
.

•

If E=1 (Echo On), the AT command (including the termi‐
nating any responses.

•

Two settings affect the format of AT command output: V
(Verbose) and Q (Quiet).

•

If Q=1 (Quiet On), no result codes are output whatsoever,
so there is no response generated by a (non query)
command.

•

If Q=0 (Quiet Off), result codes are output. The format of
this output is then affected by the Verbose setting.
If Quiet mode is off, the result code is affected as follows:

For V=1 (Verbose mode), the textual result code is sur‐
rounded by a carriage return and new line. Any AT
query response is also surrounded by a carriage return
and new line.
For V=0 (Terse mode), a numeric result code is output
with a single trailing carriage return (no new line is
output), while any AT query response is followed by a
carriage return and new line (there is no preceding
output).

•

For example, possible output to the AT command “AT”
with carriage return (assuming quiet mode is not on) is:

carriage return ‐ if V=0
carriage return and new line OK another carriage
return and new line ‐ if V=1

Note: These commands work for the port on which they are executed.
For example, if the user types ATE1 and then AT&W using a serial
port connection, it will set the serial port to Echo On.