Airlink Raven GPRS - Manual (Page 36)

Host Modes
28 Cingular GPRS Raven User Guide Version 2.01
For V=0, (Terse mode), a numeric result code is output with a single trailing
<CR> (no <LF> is output), while any AT query response is followed by
<CR><LF> (there is no preceding output).
For example, possible output to the AT command "AT<CR>" (assuming quiet
mode is not on) is:
<CR> - if V=0
<CR><LF>OK<CR><LF> - if V=1
PassThru Mode
In PassThru mode, the Raven does not behave normally, all serial communication is
passed directly between the internal hardware and the computer connected directly
to the modem. This mode can be used to configure hardware-specific settings (e.g.,
for provisioning, etc.)
Issuing the "AT\APASSTHRU" enters this mode. The modem responds with OK, at
which point a direct connection to the internal hardware is established.
PassThru Mode can only be exited by resetting the modem.
Some internal hardware requires upwards of 20 seconds before AT commands can
be entered, so be patient if there seems to be no response to AT commands.
Warning: PassThru can only be exited by resetting or power-cycling the
modem. This mode cannot be entered via a Telnet session.
PassThru Mode allows only specific AT commands. Those commands which are
used with ALEOS only will be unavailable. For the many of the commands avail-
able in PassThru mode, refer to page 91. Most of these commands are not available
except when the modem is in PassThru Mode. The commands usable also depend
heavily on the modem model number (found on the label on the top of the modem).
Note: ALEOS is disabled in PassThru Mode. You cannot use ALEOS
specific commands while the modem is in PassThru Mode.