User`s manual

AT Command Reference Manual
3-24 1048
\Nn - Operating Mode
This command controls the preferred error correcting mode to be negotiated in a subsequent data connection. This
command is affected by the OEM firmware configuration.
\N0 Selects normal speed buffered mode (disables error-correction mode). (Forces &Q6.)
\N1 Serial interface selected - Selects direct mode and is equivalent to &M0, &Q0 mode of operation.
(Forces &Q0.)
Parallel interface selected - Same as \N0.
\N2 Selects reliable (error-correction) mode. The modem will first attempt a LAPM connection and
then an MNP connection. Failure to make a reliable connection results in the modem hanging up.
(Forces &Q5, S36=4, and S48=7.)
\N3 Selects auto reliable mode. This operates the same as \N2 except failure to make a reliable
connection results in the modem falling back to the speed buffered normal mode. (Forces &Q5,
S36=7, and S48=7.)
\N4 Selects LAPM error-correction mode. Failure to make an LAPM error-correction connection
results in the modem hanging up. (Forces &Q5 and S48=0.) Note: The -K1 command can
override the \N4 command.
\N5 Selects MNP error-correction mode. Failure to make an MNP error-correction connection results
in the modem hanging up. (Forces &Q5, S36=4, and S48=128.)
Result Codes:
OK n = 0 to 5.
ERROR Otherwise.
\Vn - Single Line Connect Message Enable
The single line connect message format can be enabled or disabled by the \Vn command as follows:
\V0 Connect messages are controlled by the command settings X, W, and S95.
\V1 Connect messages are displayed in the single line format described below subject to the
command settings V (Verbose) and Q (Quiet). In Non-Verbose mode (V0), single line connect
messages are disabled and a single numeric result code is generated for CONNECT DTE.
When single line connect messages are enabled, there are no CARRIER, PROTOCOL, or COMPRESSION messages apart
from the fields described below.
The single line connect message format is:
CONNECT <DTE Speed></Modulation></Protocol></Compression></Line Speed>/<Voice and Data>
Where:
<DTE Speed = DTE speed, e.g., 57600.
Modulation = “V32” for V.32 or V.32bis modulations.
“V34” for V.34 modulations.
Note: Modulation is omitted for all other modulations.
Protocol = “NONE” for no protocol.
“ALT” for Microcom Network Protocol.
“LAPM” for LAP-M protocol.
Compression = “CLASS5” for Microcom MNP5 compression.
“V42BIS” for V.42bis compression.
Note: Compression is omitted if protocol is NONE.
Line Speed = Asymmetric rates are displayed as /rate:TX/rate:RX, e.g., /1200 TX/75 RX.
Symmetric rates are displayed as a single DCE rate, e.g., 14400.