Sierra Wireless makes a damn good CDPD product.

You could also look at RIM modules.  Again, not covered everywhere,
but supported throught the Mobitex network.

The only way to get coverage everywhere is by sending data over the
analog bandwidth of the cellular phone.  If communication is module
to module, you could knock some of the filtering off, remove
companding and get a bit better bandwidth performance.

JRC Canada built a bunch of modules for simultaneous voice and data,
but they didn't seem to take off to well.

Also I know where you can get some impressive 3 watt transceivers
and 1W handhelds for cheap that can be hacked.... clee@enlight.ca

Craig

> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Dave VanHorn
> Sent: November 24, 1999 11:18 AM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: Where to find OEM CELLULAR PHONES
>
>
> >         Second: Maybe I am wrong, and there would be another way of
> > transmiting data using another method. If so, I am open minded and am
> > listening!!!
>
>
> CDPD   Not available everywhere, but "the way to go" if it is.