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Chapter 1 – AT Commands, S-Registers, and Result Codes
\N
Description:
Syntax:
Values:
Default:
Result Codes:
\Q
Description:
Syntax:
Values:
Default:
Result Codes:
\T
Description:
Syntax:
Values:
Default:
Result Codes:
\V
Description:
Syntax:
Values:
Default:
Result Codes:
Error Correction Mode Selection
Use this command to select the type of error control used by the modem when
sending or receiving data.
AT\N<value>
0 Buffer mode. No error control (same as &Q6 ).
1 Direct mode.
2 MNP or disconnect mode. The modem attempts to connect using MNP2-4
error control procedures. If this fails, the modem disconnects. This is also
known as MNP reliable mode.
3 V.42, MNP, or buffered. The modem attempts to connect in V.42 error control
mode. If this fails, it will attempt to connect in MNP mode. If this fails, the
modem connects in buffer mode and continues operation. This is also known
as V.42/MNP auto reliable mode (same as &Q5 ).
4 V.42 or disconnect. The modem attempts to connect in V.42 error control
mode. If this fails, the modem disconnects.
5 V.42, MNP, or buffered (same as \N3 ).
7 V.42, MNP, or buffered (same as \N3 ).
3
OK if <value> = 0 to 5, or 7.
ERROR if <value> ≠ 0 to 5, or 7.
Local Flow Control Selection
Use this command to set the local flow control method.
AT\Q<value>
0 Disable flow control (same as &K0 ).
1 XON/XOFF software flow control (same as &K4 ).
3 RTS/CTS to DTE. (same as &K3 )
3
OK if <value> = 0, 1, 3.
ERROR if <value> ≠ 0, 1, 3.
Inactivity Timer
Use this command to specify the delay time used by the inactivity timer. The delay
time is the length of time in minutes that the modem waits during periods of inactivity
before disconnecting. Periods of inactivity are defined by no data being sent or
received by the DCE. To disable the inactivity timer use the T0 command. The delay
time may also be specified in S-register S30.
AT\T<value>
0 Inactivity timer disabled.
1 to 255 Specifies the length of time in minutes that the modem will wait before
disconnecting when no data is sent or received.
0
OK if <value> = 0 to 255.
ERROR if <value> ≠ 0 to 255.
Protocol Result Code
Use this command to enable or disable protocol result codes.
\V<value>
\V0 Disables protocol result code appended to the DCE speed.
\V1 Enables protocol result code appended to the DCE speed.
\V2 Same as \V1 .
\V1
OK if <value> = 0, 1, 2.
ERROR if <value> ≠ 0, 1, 2.
Multi-Tech Systems, Inc. AT Commands for the MultiModem & SocketModem MT9234 Series (S000434H)
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