Chapter 5 – AT Commands, S-Registers, and Result Codes

Error Control Commands

Command: +ES

Error Control and Synchronous Mode Selection

Description:

This extended-format command specifies the initial requested mode of

 

operation when the modem is operating as the originator. Optionally

 

specifies the acceptable fallback mode of operation when the modem is

 

operating as the originator, and optionally specifies the acceptable fallback

 

mode of operation when the modem is operating as the answerer. Accepts

 

three numeric subparameters.

Default:

Varies by request

Defined Values:

<orig_rqst>

 

Decimal number specifies the initial requested mode of operation when the

 

modem is operating as the originator. The options are:

 

+ES0

Initiate call with Direct Mode.

 

+ES1

Initiate call with Normal Mode (also referred to as Buffered Mode)

 

 

only.

 

+ES2

Initiate V.42 without Detection Phase. If V.8 is in use, disable V.42

 

 

Detection Phase.

 

+ES3

Initiate V.42 with Detection Phase. (Default.)

 

+ES4

Initiate MNP.

 

+ES6

Initiate V.80 Synchronous Access Mode when connection is

 

 

completed, and Data State is entered. (See +ESA and +ITF

 

 

commands.)

 

+ES7

Initiate Frame Tunneling Mode when connection is complete, and

 

 

Data Mode is entered.

 

<orig_fbk>

 

Decimal number specifies the acceptable fallback mode of operation when

 

the modem is operating as the originator.

 

+ES0

LAPM, MNP, or Normal Mode error control optional. (Default.)

 

+ES1

LAPM, MNP, or Direct Mode error control optional.

 

+ES2

LAPM or MNP error control required; disconnect if error control is

 

 

not established.

 

+ES3

LAPM error control required; disconnect if error control is not

 

 

established.

 

+ES4

MNP error control required; disconnect if error control is not

 

 

established.

 

<ans_fbk>

 

Decimal number specifies the acceptable fallback mode of operation when

 

the modem is operating as the answerer or specifies V.80 Synchronous

 

Access Mode.

 

+ES0

Direct Mode.

 

+ES1

Error control disabled, use Normal Mode.

 

+ES2

LAPM, MNP, or Normal Mode error control optional. (Default.)

 

+ES3

LAPM, MNP, or Direct Mode error control optional.

 

+ES4

LAPM or MNP error control required; disconnect if error control is

 

 

not established.

 

+ES5

LAPM error control required; disconnect if error control is not

 

 

established.

 

+ES6

MNP error control required; disconnect if error control is not

 

 

established.

 

+ES8

Initiate V.80 Synchronous Access Mode when connection is

 

 

completed and Data State is entered (see +ESA and +ITF).

 

+ES9

Initiate Frame Tunneling Mode when connection is complete, and

 

 

Data Mode is entered.

Examples:

+ES=6

Enable V.80 Synchronous Access Mode originator.

 

+ES=6

Enable V.80 Synchronous Access Mode originator.

 

+ES=,,8

Enable V.80 Synchronous Access Mode answerer.

Multi-Tech Systems, Inc. SocketModem MT5600SMI Developer’s Guide

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Multi-Tech Systems MT5600SMI-92 Error Control Commands, Command +ES Error Control and Synchronous Mode Selection, Origrqst