By applying some sort of modulation (fm? am? psm?) it should be possible to transfere data over gsm, but on a much lower speed then through the data channel.
On Thu, Apr 10, 2008 at 7:34 PM, Harald Welte <[EMAIL PROTECTED]> wrote: > On Tue, Apr 08, 2008 at 10:22:10AM -0400, Dan Staley wrote: > > Does anyone know if it is legal (in the standard TOS) with providers > > (such as ATnT) to send data over a normal phone call? > > this is not possible, since regular voice calls for GSM are not > bit-transparent, i.e. the voice signal is coded and potentially re-coded > (transcoded) a number of time between the calling and receiving party. > > Data calls over GSM are done using CSD. They also use quite a lot more > error correction than voice calls. > > -- > - Harald Welte <[EMAIL PROTECTED]> http://openmoko.org/ > ============================================================================ > Software for the world's first truly open Free Software mobile phone > > > > _______________________________________________ > Openmoko community mailing list > [email protected] > http://lists.openmoko.org/mailman/listinfo/community > -- My corner of the web: http://blog.ramsesoriginal.org _______________________________________________ Openmoko community mailing list [email protected] http://lists.openmoko.org/mailman/listinfo/community
