Sierra Wireless RAVEN 20070914 - Manual (Page 57)

Data Communication and Host Modes
Rev 3.0B Feb.08 52
If the serial port of the Raven is in any mode other than AT or
PassThru, the AT command mode can be re‐entered by:
• Deactivating DTR (if &D2 or Ignore DTR, S211, is not set).
• Issuing the +++ escape sequence (if Disable AT Escape,
DAE, is not set).
• Resetting or Power cycling the modem.
Note: DTR needs to be asserted (S211=1 or &D0) by the host before
PPP Mode, SLIP Mode, UDP PAD Mode, or TCP PAD Mode can be
entered.
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 <CR> (ASCII
character 0x0D), a carriage return (pressing enter on the
keyboard). Some may also include a new line or line feed
<LF>.
• If E=1 (Echo On), the AT command (including the termi‐
nating <carriage return) will be displayed (output) before
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: