Just to give you a "summary judgement": Running any kind of voice-encoded data over a regular voice channel of a GSM phone is _extremely_ unlikely to work.
There are a number of different codecs in use. Which codec is determined by the network. There is echo cancellation at potentially multiple locations during the call. There might be one or multiple transcoders of the voice codec along the road. If you can manage to design a modulation and coding scheme that survives all (or even most) of the stages above, I think you have achieved something great. I doubt you will get more than 300bps though :) -- - Harald Welte <[EMAIL PROTECTED]> http://openmoko.org/ ============================================================================ Software for the world's first truly open Free Software mobile phone _______________________________________________ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
