Appendix F – Modem AT Commands
60
Multi-Tech Systems, Inc. MultiAccess User Guide
Command:
\K
n
Break Control
Values:
n
= 0–5
Default: 5
Description:
Controls the modem's response to a break received from: computer, remote modem, or
\B
command. Response is different for each of three different states.
Data mode. Modem receives the break from the computer:
\K0
Enter online command mode, no break sent to the remote modem.
\K1
Clear data buffers and send break to the remote modem.
\K2
Same
as
\K0
.
\K3
Send break immediately to the remote modem.
\K4
Same
as
\K0
.
\K5
Send break to the remote modem in sequence with the transmitted data.
Data mode. Modem receives the break from the remote modem:
\K0
Clear data buffers and send break to the computer.
\K1
Same
as
\K0
.
\K2
Send break immediately to the computer.
\K3
Same
as
\K2
.
\K4
Send break to the computer in sequence with the received data.
\K5
Same
as
\K4
.
Online command mode. Modem receives a \Bn command from the computer:
\K0
Clear data buffers and send break to the remote modem.
\K1
Same
as
\K0
.
\K2
Send break immediately to the remote modem.
\K3
Same
as
\K2
.
\K4
Send break to the remote modem in sequence with the transmitted data.
\K5
Same
as
\K4
.
Command: \N
n
Error Correction Mode Selection
Values:
n
= 0–5, or 7
Default: 3
Description:
\N0 Non-error correction mode with data buffering (buffer mode; same as
&Q6
).
\N1
Same
as
N0
.
\N2 MNP reliable mode. If the modem cannot make an MNP connection, it disconnects.
\N3 V.42/MNP auto-reliable mode. The modem attempts first to connect in V.42 error
correction mode, then in MNP mode, and finally in non-error correction (buffer) mode
with continued operation.
\N4 V.42 reliable mode. If the modem cannot make a V.42 connection, it disconnects.
\N5 V.42, MNP, or non-error correction (same as
\ N3
).
\N7 V.42, MNP, or non-error correction (same as
\ N3
).
Command: \Q
n
Flow Control Selection
Values:
n = 0, 1, or 3
Default: 3
Description:
\Q0 Disable flow control (same as
&K0
).
\Q1 XON/XOFF software flow control (same as
&K4
).
\Q2 CTS-only flow control. Not supported.
\Q3 RTS/CTS hardware flow control (same as
&K3
).
Command: \Tn Inactivity
Timer
Values:
n = 0, 1–255
Default: 0
Description:
Sets the time (in minutes) after the last character is sent or received that the modem waits
before disconnecting. A value of zero disables the timer. Applies only in buffer mode.
Note:
You can also set the inactivity timer by changing the value of
S30
.
Command:
\Vn
Protocol Result Code
Values:
n = 0, 1, or 2
Default: 1
Description:
\V0 Disables the appending of the protocol result code to the DCE speed.
\V1 Enables the appending of the protocol result code to the DCE speed.
\V2
Same
as
\V1
.
