MultiModemDSVD User Guide

 

4 AT Commands, S-Registers, and Result Codes

Command:

&En

 

V.42bis Data Compression

Values:

 

 

n = 14 or 15

Default:

 

15

Description:

&E14

V.42bis data compression disabled.

 

&E15

V.42bis data compression enabled.

 

 

 

 

 

 

 

Note: This command controls only V.42bis data compression,

 

 

 

whereas the %C command controls both V.42bis and MNP-5

 

 

 

data compression. The command in effect is the one last en-

 

 

 

tered. See also the L5 command.

 

 

 

 

Command:

&Fn

 

Load Factory Settings

Values:

 

 

n = 0 or 1

Default:

 

None

Description:

&F0

 

Load factory configuration 0.

 

&F1

Load factory configuration 1.

 

 

 

 

 

 

 

Note: See also the Z, L5, and &V commands.

 

 

 

 

Command:

&Gn

 

V.22bis Guard Tone Control

Values:

 

 

n = 0, 1, or 2

Default:

 

0

Description:

&G0

 

Disable guard tone.

 

&G1

 

Set guard tone to 550 Hz.

 

&G2

 

Set guard tone to 1800 Hz.

 

 

 

 

 

 

 

Note: The &G command is not used in North America, and

 

 

 

may not be permitted in some countries.

 

&Jn

 

 

Command:

 

Telephone Jack Control

Values:

 

 

n = 0 or 1

Default:

 

None

Description:

&J0

 

NA

 

&J1

 

NA

 

 

 

 

 

 

 

Note: This command is included only for backwards compati-

 

 

 

bility. It performs no function except to load the S-register. The

 

 

 

parameter value, if valid, is written to S21 bit 1.

 

 

 

 

Command:

&Kn

 

Flow Control Selection

Values:

 

 

n = 0, 3, 4, 5, or 6

Defaults:

 

 

3 (data modem mode)

 

 

 

6 (fax modem and voice modes)

Description:

&K0

 

Disables flow control.

 

&K3

Enables CTS/RTS hardware flow control.

 

&K4

Enables XON/XOFF software flow control.

 

&K5

Enables transparent XON/XOFF flow control.

 

&K6

Enables both RTS/CTS and XON/XOFF flow control.

Note: See also the &E command

Multi-Tech Systems, Inc.

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