References
The following Requests For Comments (RFCs) will help you to continue researching VoIP:
- RFC 1889—RTP: A Transport Protocol for Real-Time Applications
- RFC 2327—SDP: Session Description Protocol
- RFC 2326—RTSP: Real-Time Streaming Protocol
- ITU-T Recommendation H.323
- ITU-T G. specifications for codecs
- ITU-T G.113 Voice Quality Specification
- ITU-T P.861 Perceptual Speech Quality Measure(ment), PSQM
- iLBC Codec—http://www.ilbcfreeware.org/
- RFC 3550—Real Time Transport Control Protocol
- RFC 3611—RTCP Extended Reports