Session Initiation Protocol (English Wikipedia)

Montazerolghaem, A.; Moghaddam, M. H. Y.; Leon-Garcia, A. (March 2018). "OpenSIP: Toward Software-Defined SIP Networking". IEEE Transactions on Network and Service Management. 15 (1): 184–199. arXiv:1709.01320. doi:10.1109/TNSM.2017.2741258. ISSN 1932-4537. S2CID 3873601.

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SIP: Session Initiation Protocol. 2002. doi:10.17487/RFC3261. RFC 3261.
Uniform Resource Identifiers (URI): Generic Syntax. 2005. doi:10.17487/RFC3986. RFC 3986.
The Stream Control Transmission Protocol (SCTP) as a Transport for the Session Initiation Protocol (SIP). 2005. doi:10.17487/RFC4168. RFC 4168.
Montazerolghaem, Ahmadreza; Hosseini Seno, Seyed Amin; Yaghmaee, Mohammad Hossein; Tashtarian, Farzad (2016-06-01). "Overload mitigation mechanism for VoIP networks: a transport layer approach based on resource management". Transactions on Emerging Telecommunications Technologies. 27 (6): 857–873. doi:10.1002/ett.3038. ISSN 2161-3915. S2CID 27215205.
Montazerolghaem, A.; Moghaddam, M. H. Y.; Leon-Garcia, A. (March 2018). "OpenSIP: Toward Software-Defined SIP Networking". IEEE Transactions on Network and Service Management. 15 (1): 184–199. arXiv:1709.01320. doi:10.1109/TNSM.2017.2741258. ISSN 1932-4537. S2CID 3873601.
SIP-T Context and Architectures. September 2002. doi:10.17487/RFC3372. RFC 3372.

Jonsson, Lars; Mathias Coinchon (2008). "Streaming audio contributions over IP" (PDF). EBU Technical Review. Retrieved 2010-12-27.

"What is SIP?". Network World. May 11, 2004. Archived from the original on June 24, 2014.

Montazerolghaem, Ahmadreza; Hosseini Seno, Seyed Amin; Yaghmaee, Mohammad Hossein; Tashtarian, Farzad (2016-06-01). "Overload mitigation mechanism for VoIP networks: a transport layer approach based on resource management". Transactions on Emerging Telecommunications Technologies. 27 (6): 857–873. doi:10.1002/ett.3038. ISSN 2161-3915. S2CID 27215205.
Montazerolghaem, A.; Moghaddam, M. H. Y.; Leon-Garcia, A. (March 2018). "OpenSIP: Toward Software-Defined SIP Networking". IEEE Transactions on Network and Service Management. 15 (1): 184–199. arXiv:1709.01320. doi:10.1109/TNSM.2017.2741258. ISSN 1932-4537. S2CID 3873601.

"AT&T Discusses Its SIP Peering Architecture". sip-trunking.tmcnet.com. Retrieved 2017-03-20.

"User-Agents We Have Known". VoIP User. Archived from the original on 2011-07-16.

Montazerolghaem, Ahmadreza; Hosseini Seno, Seyed Amin; Yaghmaee, Mohammad Hossein; Tashtarian, Farzad (2016-06-01). "Overload mitigation mechanism for VoIP networks: a transport layer approach based on resource management". Transactions on Emerging Telecommunications Technologies. 27 (6): 857–873. doi:10.1002/ett.3038. ISSN 2161-3915. S2CID 27215205.
Montazerolghaem, A.; Moghaddam, M. H. Y.; Leon-Garcia, A. (March 2018). "OpenSIP: Toward Software-Defined SIP Networking". IEEE Transactions on Network and Service Management. 15 (1): 184–199. arXiv:1709.01320. doi:10.1109/TNSM.2017.2741258. ISSN 1932-4537. S2CID 3873601.