Hmm, I wonder how hard it is to build a Analog to Digital Converter (ADC) and Digital to Analog Converter (DAC), suitable for mucking with a phone signal… not a dial up connection, but quite litterly ‘hook in’ to the signal as it goes from the phone jack, and into the phone. I.e. for processing and manipulation along the way….
Kind of like a router really, only workin’ with POTS rather then the common Ethernet — and like wise, with all of the fun stuff we can do with modern switching technology…. oh man, this makes me wish one of my friends was an electrician lol.