---
title: Session Initiated Protocol (SIP)
description: Session initiated Protocol or SIP is an exchange of messages part of the protocol that provides a standard format for initiating video calls and other multimedia sessions. SIP messages can be sent from a client application to a server application over various transport networks.
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# Session Initiated Protocol (SIP)

 By [Revation Systems](https://blog.revation.com/top-contact-center-definitions-list/author/revation-systems)

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---

Session initiated Protocol or SIP is an exchange of messages part of the protocol that provides a standard format for initiating video calls and other multimedia sessions. SIP messages can be sent from a client application to a server application over various transport networks.

---

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