SIP (Session Initiation Protocol) is a protocol used in VoIP communications that allows users to make voice and video calls, usually for free.
What is SIP?
SIP enables people around the world to communicate via their computers and mobile devices over the Internet. It is an important part of Internet telephony and allows you to take advantage of the benefits of VoIP (voice over IP), which provides a rich communication experience.
The most interesting advantage of SIP is how it reduces communication costs. Calls (voice or video) between SIP users are free, worldwide. There are no borders and no restrictive laws or fees. Even the SIP apps and SIP addresses are free to obtain.
SIP as a protocol is also powerful and efficient. Many organizations use SIP for their internal and external communication, centered around a PBX.
