I happen to have one of those phones a friend gave me to see if I could
fgure out how it works.
Do you have details, or a manual?
On Thu, 26 Oct 2000, Reynolds, Alfred wrote:
> You may have noticed the defence part of my email addr, what I developed is
> for a military phone. These phones have a digital 16kb/s output (some weird
> line coding tho, urgh). Now, for bits I can't get into detail but here is a
> "wavy the hands" overview.
> phone -> wire -> demod to 16kb/s 4 wire (tx,tx clk, rx, rx clk) -> PIC (via
> port B and port D) -> rs232 on pic -> ucsimm -> ethernet.
> The system is duplex. The pic is the hard edge of the system where a small
> (70 byte) buffer exists, and the ucsimm works at a packet level (70 byte
> My pcb design is such that the demod part is on another board so it would be
> easy to say plug an adc in that could make a 64kb/sec sampling rate into the
> system (rs232 line speed is 115k). You could also use the adc part of the
> pic I guess too.
> This design is robust to anything but the ugliest of ethernet networks :)
> Only problem is that the ucsimm doesn't make it cheap :(
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