MultiModemDSVD User Guide

 

4 AT Commands, S-Registers, and Result Codes

Command:

%U

PCM Code Selection

Values:

 

 

n = 0 or 1

Default:

 

0

Description:

 

 

Specifies the PCM code type for 56K modulation. Note, how-

 

 

 

ever, that the modem automatically selects the code type if the

 

 

 

server sends the proper ID.

 

%U0

 

Selects µ-Law coding—used in North America and Japan.

 

%U1

 

Selects A-Law coding—used outside North America and Japan.

 

 

 

 

 

 

 

Note: See also the +MS= command.

 

\An

 

 

Command:

 

Maximum MNP Block Size

Values:

 

 

n = 0, 1, 2, or 3

Default:

 

1

Description:

\A0

 

64-character maximum block size.

 

\A1

 

128-character maximum block size.

 

\A2

 

192-character maximum block size.

 

\A3

 

256-character maximum block size.

Command:

\Bn

 

Transmit Break

Values:

 

 

n = 0–9 in 100 ms units

Default:

 

3

Description:

 

 

In non-error-correction mode only, sends a break signal of the

 

 

 

specified length to a remote modem. Works in conjunction

 

 

 

with the \K command.

Command:

\Kn

 

Break Control

Values:

 

 

n = 0–5

Default:

 

5

Description:

 

 

Controls the response of the modem to a break received from

 

 

 

the computer, the remote modem, or the \B command. The

 

 

 

response is different for each of three different states.

 

 

 

Data mode. The modem receives the break from the computer:

 

\K0

Enter online command mode, no break sent to the remote mo-

 

 

 

dem.

 

\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 trans-

 

 

 

mitted data.

 

 

 

Data mode. The modem receives the break from the remote

 

 

 

modem during a non-error-corrected connection:

 

\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.

Multi-Tech Systems, Inc.

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