How does a SIP trunk work?

A Session Initiation Protocol (SIP) trunk is a virtual connection that enables voice and video communications over the internet. When a call is made using a SIP trunk, the call is converted into data packets and transported over an IP network. The SIP trunk acts as a bridge between a private branch exchange (PBX) system and an internet telephony service provider (ITSP). It allows companies to connect their traditional phone systems to the internet, enabling them to make and receive calls using their existing infrastructure. SIP trunks work by establishing a signaling channel between the PBX and the ITSP, which allows for the exchange of information necessary to initiate, manage, and terminate calls. This technology offers cost savings, scalability, and flexibility for organizations, as it eliminates the need for physical phone lines and allows for easy expansion.

This mind map was published on 13 November 2023 and has been viewed 94 times.