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88 MultiModemISI Hybrid Series, ISIHI-2S
Chapter 4—MODEM AT Commands, S-Registers, Result Codes
Modem
AT Commands that Affect S-Registers
For maximum throughput, the ISIHI-2S’s default configuration is for originating a call to
another 33,600 bps modem that supports error correction, data compression, and flow
control. If the receiving modem is not compatible, the ISIHI-2S can match any ITU-T or
Bell standard modem (but not proprietary protocols).
If you require a different configuration for your application, for example, if you want to use
an ISIHI-2S modem strictly as an auto answering device or for service that does not
support error correction, you can change the command parameters and S-register values
in active memory and save the new values with the &W command.
The &W0 (or &W) command stores all current AT command and S-register values into
nonvolatile random access memory (NVRAM) and configures the modem so that it reads
your custom settings in NVRAM when the modem is turned on or when it is reset with the
Z command. (The &F reset command will continue to read the factory default settings in
read-only memory [ROM].) For convenience, you can include the &W command in the
same command string that sets the new values in active memory as in the following
example: AT\N2&C1S0=10&W0<cr>