Chapter 2 - AT Commands, S-Registers, and Result Codes

 

Command: %DCn AT Command Control

Values:

n = 0 or 1

Default:

0

Description: %DC0

The modem responds to AT commands.

%DC1 The modem ignores AT commands.

Note: The modem will respond to AT%DC for 10 seconds after power-up.

Command: %En Fallback and Fall Forward Control

Values:

n = 0, 1, or 2

Default:

2

Description: %E0

Disable fallback and fall forward.

%E1

Enable fallback, disable fall forward.

%E2

Enable fallback and fall forward.

Command: $Dn

DTR Dialing

Values:

n = 0 or 1

Default:

0

Description: $D0 Disables DTR dialing.

$D1 Dials the number in memory location 0 when DTR goes high.

Command: +ES=n Enable Synchronous Buffered Mode

Values:

n = 6

Default:

None

Description:

Allows an H.324 video application direct access to the synchronous data channel. On underflow,

 

the modem sends HDLC flag idle (0x7E) to the remote modem.·This special error control mode is

 

overridden by any of the following commands: &F, &M, &Q, or \N.

 

AT+ES=? shows the only allowed value.

 

AT+ES? shows the current value.

Command: #Sx

Enter Setup Password

Values:

x= password (1–8 characters, case sensitive)

Default:

MTSMODEM

Description:

Enters the remote configuration setup password.

Command: #S=x Store Setup Password

Values:

x= password (1–8 characters, case sensitive)

Default:

MTSMODEM

Description:

Stores a new remote configuration setup password.

Command: +++AT<CR> Escape Sequence

Values:

n/a

Description:

Puts the modem in command mode (and optionally issues a command) while remaining online.

 

Type +++AT and up to ten command characters, then press ENTER. Used mostly to issue the

 

hang-up command: +++ATH<CR>.

Command: %%%AT<CR>Remote Configuration Escape Sequence

Values:

n/a

Description:

Initiates remote configuration mode while online with remote modem. The remote configuration

 

escape character (%) is defined in register S13.

MT3334SMI

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Multi-Tech Systems MT3334SMI Command %DCn AT Command Control, Command %En Fallback and Fall Forward Control, DTR Dialing