Introduction - If you have any usage issues, please Google them yourself
SIP protocol is an open source library that implements the SIP, SDP, RTP, STUN, TURN and ICE. PJSIP provided as a SIP-based multimedia communications framework very clear API, and NAT traversal function. PJSIP has a very good portability, supports almost all of today s system: desktop systems, embedded systems to smart phones.