A session initiation protocol (SIP) server is a network server that facilitates the initiation, maintenance, and termination of multimedia communication sessions, such as voice, video, and instant messaging. It acts as a central controller, managing the signaling and routing of calls between endpoints and providing services such as call setup, call routing, and call termination.
SIP servers are an essential component of VoIP (Voice over Internet Protocol) networks, enabling the delivery of real-time communication services over IP networks. They offer several key benefits, including: