| Re: History of Hayes Modem |
|---|
As far as I know, his was the first modem to use in-band signalling.
It was really rather clever to build a UART into the modem and use it
to let the computer control the modem over the same channel as it used
to communicate with the remote system.
In-band signalling has its problems (that's what made blue boxes
possible) but in this case it let people hook up modems to their PCs
using a cheap generic serial interface.
R's,
John