Sierra Wireless DART 200, User Manual

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DART 200 CDPD Modem User’s Guide F DART AT Command Set
PN1197-00 Revision 1.0 F-15
Table F-3. Commands beginning with backslash (\) (cont.)
\N
(cont.)
Format:
AT\N2 B side only
AT\N3
A side preferred (default)
AT\N4
B side preferred
Choose \N3 or \N4 only if the modem is used in a visiting (traveling) application
Result codes:
OK
Valid argument
ERROR
Invalid argument
\O Select PAD or Telnet Operating Mode
Allows the user to select Packet Assembler/Disassembler (PAD) mode, or telnet mode for modem
operations. Refer to
PAD operating mode, p. 8-25, for more information.
Telnet mode logs on a user to a remote host by emulating an ASCII terminal. A telnet session uses TCP
protocol but generates additional packets both during session initiation (when terminal emulation
parameters are being negotiated), and during operation (when host echo is usually used).
PAD mode is used to communicate with specific applications or devices using TCP or UDP and usually
have less overhead than telnet. It also supports binary mode data transfers that telnet does not.
NOTE:
Telnet mode is not appropriate for telemetry applications.
To facilitate telnet setup several related profile parameters are forced by the AT\O command as follows:
\O1
Select telnet mode (default)
F1
Use remote echo when in online mode
\M0
Disable manual data forwarding
\T1
Enable automatic data forwarding
\O0
Select PAD mode
F0
Use local echo while in online mode
\M1
Enable manual data forwarding
\T0
Disable automatic data forwarding
Format:
AT\O0
Select PAD mode
AT\O1
Select TELNET mode (default)
Result codes:
OK
Valid argument
ERROR
Invalid argument