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MT2834ZPX Owner's Manual
AT Commands and S-Register Summary
The vast majority of installations are similar, with the MT2834ZPX
being used to dial up a remote installation where the call is
automatically answered. Your MT2834ZPX has a default configuration
to dial another 33,600 bps modem that support error correction, data
compression and flow control. If the answering modem is not
compatible, the MT2834ZPX 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 MT2834ZPX to
conform to a specific application. The MT2834ZPX can store its
configuration parameters and S-Register values in its nonvolatile
memory (RAM). This command also sets the modem upon power up,
or when it is reset with an ATZ command, the modem 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 modem 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 modem's current 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.