360 Smart Cloud

Jan 10, 2020 · Fundamentals

Introduction to SIP Protocol: Architecture, Message Structure, Transactions, and Open‑Source Stacks

This article provides a comprehensive overview of the Session Initiation Protocol (SIP), covering its role in multimedia session signaling, stack placement, core network entities, message formats, transaction handling, related RFCs, and a brief comparison of popular open‑source SIP stacks.