SIP Basics
S I P: A C L O S E R L O O K
Application layer control protocol
Transported over UDP for simplicity and speed
Text-based Internet protocol ala HTTP, SMTP
Establishes, modifies, terminates multimedia sessions/calls
Client-server architecture
Relies on:
- SDP (Session Description Protocol) for
- media description and codec identification
- RTP/RTCP (Real-Time Protocol) for
- transporting media streams