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SIP (Session Initiation Protocol) is a signaling protocol, widely used for setting up, connecting and disconnecting communication sessions, typically voice or video calls over the Internet. SIP is a standardized protocol with its basis coming from the IP community and in most cases uses UDP or TCP. Session Initiation Protocol (SIP) is becoming the signalling protocol of choice in the IP telephony, VoIP and unified communications (UC) industries. Documentation Home > The SIP Servlet Tutorial > Chapter 1 Overview of The session initiation protocol (SIP) is a simple network signalling protocol for The Session Initiation Protocol (SIP) is a signaling protocol used for initiating, maintaining, and terminating real-time sessions that include voice, video and SIP Tutorial. SIP is a signalling protocol designed to create, modify, and terminate a multimedia session over the Internet Protocol. It is an application layer protocol that incorporates many elements of the Hypertext Transfer Protocol (HTTP) and the Simple Mail Transfer Protocol (SMTP). SIP (Session Initiation Protocol) is a signaling protocol used to create, manage and terminate sessions in an IP based network. A session could be a simple two-way telephone call or it could be a collaborative multi-media conference session. 12 Nov 2016 SIP, the session initiation protocol, is the IETF protocol for VOIP and other text and SIP message bodies for phone calls are defined in SDP -the session . full day VOIP tutorial Powerpoint presentation (large 13MB zip file); Great SIP tutorial 2 May 2001 hgs/SIP Tutorial. 1. The Session Initiation Protocol. (SIP). Henning Schulzrinne. Dept. of Computer Science. Columbia University. New YorkThis chapter describes Session Initiation Protocol (SIP) and the interaction between SIP and SIP and Cisco Unified Communications Manager, page 40-2.