Product data

USRobotics

Command Reference

Data Command Set - 65

Synchronous Access Mode Commands

+ESA - Configure Synchronous Access Mode

This extended-format compound parameter controls the manner of operation of

the Synchronous Access Mode in the modem.

Enabling Synchronous Access Mode enables the use of the 8-bit command

characters defined in Table 9/V.80 of the Draft ITU-T Recommendation V.80

(DATA COMMUNICATION OVER THE TELEPHONE NETWORK; In-Band

modem Control and Synchronous Data Modes for Asynchronous DTE).

Syntax

+ESA=[<trans_idle>[,<framed_idle>[,<framed_un_ov>[,<hd_auto>[,<crc_type>

[,<nrzi_en>[,<syn1>[,<syn2>]]]]]]]]

Defined Values

<trans_idle> Decimal number which specifies the bit sequence transmitted by

the modem when a transmit data buffer underrun condition

occurs, while operating in Transparent sub-Mode. The options

are:

0 In Transparent sub-Mode, modem transmits 8-bit SYN sequence

on idle. Modem receiver does not hunt for synchronization

sequence (default and fixed).

<framed_idle> Decimal number which specifies the bit sequence transmitted by

the modem when a transmit data buffer underrun condition

occurs immediately after a flag, while operating in Framed sub-

Mode. The options are:

<cr><lf>NO CAR-

RIER<cr><lf>

9 Originating Modem that Sends a Protocol Octet

that indicates LAPM

AT&FS0=1<cr> AT&FS0=1<cr>

AT+A8E=6,5,,,,"1"<cr

AT+A8E=6,5,,,,"1"<cr><

cr><lf>OK<cr><lf>

<cr><lf>CONNECT

57600<cr><lf>

Table 3-3: V.8/V.8bis Example Commands/Responses for Originator and Answerer

Originator Answerer

Scenario DTE Command Modem Response

or Indication

DTE Command Modem Answerer

Response or Indica-

tion