TRS-80 Model 100: Phone port pinout

From: Fred Cisin <>
Date: Mon Feb 7 15:51:04 2005

> >> AFAIK cell phones use compression on the digitalized audio stream to get
> >> it down to 9600 bit/s. (?) This is optimized for speach and may not fit
> >> the frequency spectrum generated by a modem.
> >I'm willing to bet it works.
> It works. (Turns out I had my MIC and SPEAKER lines swapped.)
> I'm averaging one bad character per line, but it looks good enough for
> email on the road. My provider is T-Mobile and I have a "full bar"
> signal in York Haven. Maybe I should take my phone and a friend's AT&T
> and go try it in York or Harrisburg.

Sound quality may remain an issue as long as "Can you hear me now?"
bills itself as an adequate measure of sound quality!
Received on Mon Feb 07 2005 - 15:51:04 GMT

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