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Hello, first of all, I am going to sum up what I am trying to do, so that best advice can be given. The final objective is to write a simple application to establish a VoIP communication over a GPRS link. So it would be to get a full duplex (capture/playback) sound application that captured from microphone, compresses speech with Speex, and sends it trough the socket API over the GPRS link. By

Hello, I am trying to write a simple application to test VoIP capabilities over a GPRS link. To do such a thing I've used Speex 1.1.11 to capture voice and compress it as much as posible. And now, I am taking care about the communication process. Because it is supposed to be a voice application, I need at least the use of RTP to ensure proper handling of packets over the GPRS network. So far,

If I use SDP, or SIP, or H.32x, I would have my total headers length increased, making it harder to fit payload and headers all together in the GPRS bandwidth (9.6Kbps). So I would like, if possible, to avoid using nothing but RTP/UDP/IP. Juan. El vie, 20-01-2006 a las 08:03 -0800, Duane Storey escribi?: > You generally negotiate the RTP stream via a protocol like SIP or H.323. > For SIP,