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Session Initiation Protocol

voice-over-IP communications protocol
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Session Initiation Protocol

Summary

Session Initiation Protocol is a signaling protocol[1]. It draws 1,656 Wikipedia views per month (signaling_protocol category, ranking #1 of 3).[2]

Key Facts

  • Session Initiation Protocol is credited with the discovery of Jonathan Rosenberg[3].
  • Session Initiation Protocol's instance of is recorded as signaling protocol[4].
  • Session Initiation Protocol is used for Voice over IP[5].
  • Session Initiation Protocol is used for Call control[6].
  • Session Initiation Protocol's Commons category is recorded as Session Initiation Protocol[7].
  • Session Initiation Protocol's described by source is recorded as RFC 3261: SIP: Session Initiation Protocol[8].
  • Session Initiation Protocol's described by source is recorded as RFC 2543: SIP: Session Initiation Protocol[9].
  • Session Initiation Protocol's described by source is recorded as RFC 3265: Session Initiation Protocol (SIP)-Specific Event Notification[10].
  • Session Initiation Protocol's described by source is recorded as RFC 6665: SIP-Specific Event Notification[11].
  • Session Initiation Protocol's described by source is recorded as RFC 7621: A Clarification on the Use of Globally Routable User Agent URIs (GRUUs) in the SIP Event Notification Framework[12].
  • Session Initiation Protocol's described by source is recorded as RFC 5367: Subscriptions to Request-Contained Resource Lists in the Session Initiation Protocol (SIP)[13].
  • Session Initiation Protocol's described by source is recorded as RFC 5727: Change Process for the Session Initiation Protocol (SIP) and the Real-time Applications and Infrastructure Area[14].
  • Session Initiation Protocol's described by source is recorded as RFC 3969: The Internet Assigned Number Authority (IANA) Uniform Resource Identifier (URI) Parameter Registry for the Session Initiation Protocol (SIP)[15].
  • Session Initiation Protocol's described by source is recorded as RFC 3427: Change Process for the Session Initiation Protocol (SIP)[16].
  • Session Initiation Protocol's described by source is recorded as RFC 3968: The Internet Assigned Number Authority (IANA) Header Field Parameter Registry for the Session Initiation Protocol (SIP)[17].
  • Session Initiation Protocol's described by source is recorded as RFC 7957: DISPATCH-Style Working Groups and the SIP Change Process[18].
  • Session Initiation Protocol's described by source is recorded as RFC 6446: Session Initiation Protocol (SIP) Event Notification Extension for Notification Rate Control[19].
  • Session Initiation Protocol's described by source is recorded as RFC 3853: S/MIME Advanced Encryption Standard (AES) Requirement for the Session Initiation Protocol (SIP)[20].
  • Session Initiation Protocol's described by source is recorded as RFC 4320: Actions Addressing Identified Issues with the Session Initiation Protocol's (SIP) Non-INVITE Transaction[21].
  • Session Initiation Protocol's described by source is recorded as RFC 4916: Connected Identity in the Session Initiation Protocol (SIP)[22].
  • Session Initiation Protocol's described by source is recorded as RFC 5393: Addressing an Amplification Vulnerability in Session Initiation Protocol (SIP) Forking Proxies[23].
  • Session Initiation Protocol's described by source is recorded as RFC 5621: Message Body Handling in the Session Initiation Protocol (SIP)[24].
  • Session Initiation Protocol's described by source is recorded as RFC 8262: Content-ID Header Field in the Session Initiation Protocol (SIP)[25].
  • Session Initiation Protocol's described by source is recorded as RFC 5368: Referring to Multiple Resources in the Session Initiation Protocol (SIP)[26].
  • Session Initiation Protocol's described by source is recorded as RFC 6442: Location Conveyance for the Session Initiation Protocol[27].

Body

Definition and Type

Session Initiation Protocol's instance of is recorded as signaling protocol[4].

Use and Application

Recorded has use include Voice over IP[5] and Call control[6].

Why It Matters

Session Initiation Protocol draws 1,656 Wikipedia views per month (signaling_protocol category, ranking #1 of 3).[2] It has Wikipedia articles in 27 language editions, a strong signal of global cultural recognition.[28] It is known by 25 alternative names across languages and contexts.[29]

Related Entities

eXosip Henning Schulzrinne Jonathan Rosenberg

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [4] ↑ . RFC 3261: SIP: Session Initiation Protocol. Retrieved . wikidata.org.
  2. [3] ↑ . weare.cisco.com. Retrieved . weare.cisco.com. Provenance: wikidata.org.
  3. [5] ↑ . wikidata.org.
  4. [6] ↑ . wikidata.org.
  5. [7] ↑ . wikidata.org.
  6. [8] ↑ . wikidata.org.
  7. [9] ↑ . wikidata.org.
  8. [10] ↑ . wikidata.org.
  9. [11] ↑ . wikidata.org.
  10. [12] ↑ . wikidata.org.
  11. [13] ↑ . wikidata.org.
  12. [14] ↑ . wikidata.org.
  13. [15] ↑ . wikidata.org.
  14. [16] ↑ . wikidata.org.
  15. [17] ↑ . wikidata.org.
  16. [18] ↑ . wikidata.org.
  17. [19] ↑ . wikidata.org.
  18. [20] ↑ . wikidata.org.
  19. [21] ↑ . wikidata.org.
  20. [22] ↑ . wikidata.org.
  21. [23] ↑ . wikidata.org.
  22. [24] ↑ . wikidata.org.
  23. [25] ↑ . wikidata.org.
  24. [26] ↑ . wikidata.org.
  25. [27] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [28] ↑ . Wikidata sitelinks. wikidata.org.
  3. [29] ↑ . Wikidata aliases. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). Session Initiation Protocol. Retrieved May 3, 2026, from https://4ort.xyz/entity/session-initiation-protocol
MLA “Session Initiation Protocol.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/session-initiation-protocol.
BibTeX @misc{4ortxyz_session-initiation-protocol_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Session Initiation Protocol}}, year = {2026}, url = {https://4ort.xyz/entity/session-initiation-protocol}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Session Initiation Protocol — https://4ort.xyz/entity/session-initiation-protocol (retrieved 2026-05-03)

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Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 5w ago · Twofivesixbot bot · 2026-05-24 view diff on Wikidata ↗
    Derivative work → Media Server Control Markup Language
    Instance of → signaling protocol
    Port → {'amount': '+5060'}, {'amount': '+5060'}, {'amount': '+5060'}
    Osi model layer location → application layer
    + 5 other properties edited (see Wikidata diff for full list)
    "/* wbsetclaim-update-qualifiers:1||1|2 */ [[Property:P8189]]: 987007542412205171, mv to monolingual text names on J9U statements"
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