| https://tools.ietf.org/html/rfc3261 | SIP: Session Initiation Protocol |
| https://tools.ietf.org/html/rfc3665 | Session Initiation Protocol (SIP) Basic Call Flow Examples |
| https://tools.ietf.org/html/rfc6141 | Re-INVITE and Target-Refresh Request Handling in the Session Initiation Protocol (SIP) |
| https://tools.ietf.org/html/rfc4566 | SDP: Session Description Protocol |
| https://tools.ietf.org/html/rfc4028 | Session Timers in the Session Initiation Protocol (SIP) |
| https://tools.ietf.org/html/rfc1889 | RTP: A Transport Protocol for Real-Time Applications |
| https://tools.ietf.org/html/rfc2326 | Real Time Streaming Protocol (RTSP) |
| https://tools.ietf.org/html/rfc2327 | SDP: Session Description Protocol |
| https://tools.ietf.org/html/rfc3015 | Megaco Protocol Version 1.0 |
| https://tools.ietf.org/html/rfc1918 | Address Allocation for Private Internets |
| https://tools.ietf.org/html/rfc2663 | IP Network Address Translator (NAT) Terminology and Considerations |
| https://tools.ietf.org/html/rfc3605 | Real Time Control Protocol (RTCP) attribute in Session Description Protocol (SDP) |
| https://tools.ietf.org/html/rfc3711 | The Secure Real-time Transport Protocol (SRTP) |
| https://tools.ietf.org/html/rfc4568 | Session Description Protocol (SDP) Security Descriptions for Media Streams |
| https://tools.ietf.org/html/rfc4585 | Extended RTP Profile for Real-time Transport Control Protocol (RTCP)-Based Feedback (RTP/AVPF) |
| https://tools.ietf.org/html/rfc5124 | Extended Secure RTP Profile for Real-time Transport Control Protocol (RTCP)-Based Feedback (RTP/SAVPF) |
| https://tools.ietf.org/html/rfc5245 | Interactive Connectivity Establishment (ICE): A Protocol for Network Address Translator (NAT) Traversal for Offer/Answer Protocols |
| https://tools.ietf.org/html/rfc5626 | Managing Client-Initiated Connections in the Session Initiation Protocol (SIP) |
| https://tools.ietf.org/html/rfc5761 | Multiplexing RTP Data and Control Packets on a Single Port |
| https://tools.ietf.org/html/rfc5764 | Datagram Transport Layer Security (DTLS) Extension to Establish Keys for the Secure Real-time Transport Protocol (SRTP) |