: VOIP program
: 2019-02-28 13:47:19
Description: Like these protocols, this SIP also allows the use of Internet endpoints (user agents) to find participants and allows the creation of a shared session description. In order to locate precise session participants and for other purposes, SIP allows the creation of basic network hosts (called proxy servers) and allows end users to register, issue session invitations, or make other requests. SIP is a lightweight, multi-purpose tool that can be used to create, modify and terminate sessions. It operates independently of the communication protocol and does not depend on the type of session established.
SIP协议.RFC3621中文版.pdf, 655172 , 2019-02-28