Editing Session Initiation Protocol (section)

==Applications==
''SIP connection'' is a marketing term for [[voice over Internet Protocol]] (VoIP) services offered by many [[Internet telephony service provider]]s (ITSPs). The service provides routing of telephone calls from a client's [[private branch exchange]] (PBX) telephone system to the PSTN. Such services may simplify corporate information system infrastructure by sharing [[Internet access]] for voice and data, and removing the cost for [[Basic Rate Interface]] (BRI) or [[Primary Rate Interface]] (PRI) telephone circuits.

[[SIP trunking]] is a similar marketing term preferred for when the service is used to simplify a telecom infrastructure by sharing the carrier access circuit for voice, data, and Internet traffic while removing the need for PRI circuits.<ref>{{Cite web|url=http://sip-trunking.tmcnet.com/topics/enterprise-voip/articles/109840-att-discusses-its-sip-peering-architecture.htm|title=AT&T Discusses Its SIP Peering Architecture|website=sip-trunking.tmcnet.com|access-date=2017-03-20}}</ref><ref>{{Cite web|url=http://hdvoicenews.com/2010/10/18/from-iit-voip-conference-expo-att-sip-transport-powerpoint-slides/|title=From IIT VoIP Conference & Expo: AT&T SIP transport PowerPoint slides|date=2010-10-19|website=HD Voice News|access-date=2017-03-20}}</ref>

SIP-enabled video surveillance cameras can initiate calls to alert the operator of events, such as the motion of objects in a protected area.

SIP is used in [[audio over IP]] for [[broadcasting]] applications where it provides an interoperable means for audio interfaces from different manufacturers to make connections with one another.<ref>{{cite web |url=http://tech.ebu.ch/webdav/site/tech/shared/techreview/trev_2008-Q1_coinchon.pdf |title=Streaming audio contributions over IP |access-date=2010-12-27 |last=Jonsson |first=Lars |author2=Mathias Coinchon  |year=2008 |work=EBU Technical Review}}</ref>