Sierra Wireless DART 200 CDPD Modem - Manual (Page 23)

DART 200 CDPD Modem User’s Guide 1 Introduction
PN1197-00 Revision 1.0 1-5
Do not enter an AT command that requires a parameter without using
one, as the missing parameter defaults to zero. For example, if you
entered AT\N without a value in the range of 1 to 4, the command
defaults to AT\N0. The \N0 setting also forces \J1, causing channel
acquisition problems.
Similarly, the same thing can happen with concatenation. If you enter an
invalid command, such as AT\N?, the DART 200 assumes a
concatenation of AT\N and AT? The result is a display of the last
register referenced (due to the AT?) and to set \Nn to \N0.
Use caution when entering commands. If you get unexpected results,
display the register settings and modem profile with an AT&V command
to check there is no entry error.
Table 1-1. Basic AT command set
A/ Repeat
A Answer Online
D Dial (connection setup)
E Command Mode Echo
F Online Mode Echo
H Hang-up (close connection)
I Identify
O Enter Online Mode
Q Quiet Mode
S Select Register
V Verbose Result Codes
X Extended Result Codes
Z Soft Reset
? Read Selected Register
= Write Selected Register
&C Set DCD Operation
&D Set DTR Operation
&E Escape Code Recognition On or Off
&F Restore Factory Defaults
&L Set DART Line Speed and Format
&S Set DSR Operation
&V View Active Profile
&V+ View Radio Resource status
&W Save Active Profile
&Z Set or Display Dial Directory Entries
\F Set Data Forwarding Operation
\J Restrict Channel Selection
\M Manual Transmit Control
\N Set Side Preference
\O Select PAD or Telnet Operating Mode
\P Set, Enable or Disable PIN
\Q Set Flow Control Operation
\R Network Registration Control
\S Set Subscriber Identity
\T Automatic Transmit Control
*A Select Server Type
*B Enable/Disable Reception of Broadcast Messages
? ?
NOTE:
Entering invalid AT
commands can cause
incorrect and
unexpected results.