A Session Initiation Protocol (SIP) trunk is a virtual connection between a Private Branch Exchange (PBX) and a Voice over Internet Protocol (VoIP) provider. It allows businesses to make and receive phone calls over the internet instead of using traditional phone lines. SIP trunks are often used by businesses that have multiple locations or employees who work remotely.
SIP trunks offer a number of benefits over traditional phone lines, including lower costs, increased flexibility, and improved call quality. SIP trunks are also more scalable than traditional phone lines, making them ideal for businesses that are growing or expect to grow in the future.