Dial Up Solutions

Stephen Satchell list at satchell.net
Mon Oct 19 00:21:46 UTC 2015

On 10/18/2015 03:38 PM, Aaron Hopkins wrote:
> It appears to be limited to 14.4k due to patent issues and handles faxes
> only, but its existence suggests writing a software-only data modem should
> be possible.

That's exactly what WinModems were, back in the day.  The board was 
nothing more than a DAA, a codec, and an ASIC to transmit and receive 
the raw data.  For V.34, the software required about 60 MHz of clock; 
for V.32 bis the load was closer to 24 MHz.

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