> You're talking about chips designed for full-duplex cable
> communications.  Did you look at the MX614P as sold 
> by "Glitchbuster"?  It's used (among other things) for 
> Amateur Radio Packet modems - and they certainly don't 
> "train or synchronise" because the communication is one-way 
> at a time (and there may be multiple recipients)  
> and any error detection and correction is done higher up the 
> stack.  Have a look at  
> http://www.glitchbuster.com  and follow the link he has to a 
> project using it.

I never thought of Packet Radio.. dam that is exactly what I need. 
I looked into the MX614P and the project he links to... turns out 
that there is a kit avaliable from "far circuits" which does the 
entire conversion process for me. This is perfect. 

Audio in serial out and vice versa... Plus it supports 1200 baud which
should be more then enough to send 90 bytes per second. 

Thanks for the advice, 

Mike


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