The following are useful sources of information about Voice over Internet
Protocol and Session Initiation Protocol:
- RFC 1889 Transport Protocol
for Real-Time Applications
- RFC 2327 SDP: Session Description
Protocol
- RFC 2782 A DNS RR for specifying
location of services (DNS SRV)
- RFC 2833 IETF RTP Payload
for DTMF Digits
- RFC 3261 SIP: Session Initiation
Protocol (Current RFC June 2002)
- RFC 3264 Offer/Answer Model
with SDP
- RFC 3265 SIP Specific Event
Notification
- RFC 3515 SIP REFER Method
- RFC 3551 RTP Profile for
Audio and Video Conferences with Minimal Control
- Draft-ietf-sip-cc-transfer-05 SIP Call Control Transfer
- Draft-ietf-sip-replaces-05.txt
- Draft-levy-sip-diversion-06.txt