Ironically I am looking to do the same thing over CB radio for very
limited use (unencrypted and all that jazz)
I found this website that you might be interested in. I'm thinking
something could be done very similarly with a few opamps and PLLs. The
XR2206 and 2211 chips don't seem to be easy to find and/or cheap. I
think something like 1200/2200 FSK should be reliable, though I have to
admit I don't know the intricacies of expecting cell phones to work
worth a crap for analog transmission.
I know I do a lot of "what.. What.. WHAT?" on my cell phone.
--
Martin Klingensmith


Jay Shroff wrote:

>Hi All, 
>
>I am hoping that someone on piclist has experience with this
>
>I would like to try sending data over the traffic channel  (voice channel)
>on a CDMA phone.  Since CDMA has a variable rate voice coder I am assuming that any high speed modulation schemes would be foiled by the vocoder. 
>
>My data requirements are pretty small so  I am guessing that even with the vocoders I should be able to do AFSK modulation (Bell 103) scheme and the vocoders would allow  that to pass thru? 
>
>I am planning on trying this out on my Verizon phone but if someone has already tried this it would save me some time :-)
>
>Thanks
>Jay
>
>
>
>
>  
>


-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist