Session Initiation Protocol (SIP) was designed as an initiative to provide support to latest multimedia applications while assisting its users in making calls by directing their private branch exchange (PBX) telephone system to the public switched telephone network (PSTN). Often considered as a general marketing term for Voice over Internet Protocol, SIP is used to signal and moderate the multi-media communication sessions including video calls, voice calls, instant messaging and so on.
SIP is a communication protocol in textual format, which is intended to establish, terminate or even modify a message between end-points. These SIP messages are encrypted with Transport Layer Security (TLS) for secure transmission. It is considered as one of the best existing mechanism to control the interactions via messaging between two users by unfailingly delivering the communication post to the end-users.
It was designed in a manner to be independent of its transport protocol layers in order to efficiently run on Transmission Control Protocol, Stream Control Transmission Protocol or User Datagram Protocol. Besides this, the SIP routing protocol works in tandem with Session Description Protocol (SDP) to recognize and classify the multimedia messages and utilize Real-time Transport Protocol (RTP) and Secure Real-time Transport Protocol (SRTP). It also includes various other elements of HTTP (Hyper Text Transfer Protocol) and SMTP (Simple Mail Transfer Protocol).
SIP encryption has become a dire necessity in the current internet scenario wherein usage of internet has become an essential requirement for staying or getting in touch with people around the world via free messages or calls. Pay U Numbers knows the significance of security in this ever-increasing internet usage environment and thus avail its users with the finest and latest technologies and systems in the market.