Specifications

ISI3334/4 Hardware/Driver Installation Manual

2.4.1 AT Commands and S-Register Summary

The multiple modems on the MultiModemISI card have a default

configuration to connect with another 33,600 bps modem that

support error correction, data compression and flow control. If the

remote modem is not compatible, the MultiModemISI can match

protocols, provided the protocols are industry standard (i.e., ITU-T,

AT&T or Bell) and not proprietary.

AT&W0 (or AT&W) command, used in conjunction with specific

other AT commands and S-Registers, can reconfigure the

MultiModemISI to conform to a specific application. The

MultiModemISI can store its configuration parameters and S-

also sets the MultiModemISI upon power up, or when it is reset with

an ATZ command, the MultiModemISI reads all its configuration and

S-Register parameters from RAM, and not from the factory settings

in ROM (note you may recall factory installed defaults by entering

AT&F8&W0).

The &W command changes the configuration parameters stored in

RAM that you specifically intend to alter. All other default

parameters remain unchanged.

The AT&W1 command sets the MultiModemISI so that it does not

store its parameters in RAM, and on power up or when an ATZ

command is issued, parameters are read from the factory default

settings in ROM.

You may first view the MultiModemISI current modem operating

parameters by using the ATL5, ATL6 and ATL7 commands to

display the current modem configuration; then alter the modem's

configuration settings if your application requires you to do so.