Understanding SIP Trunk and SIP Lines

A SIP trunk is a digital version of a traditional phone system that connects to multiple SIP lines, providing individual phone numbers and lines across an organization. A SIP line is the individual phone line connected to the greater SIP trunk, allowing for one call at a time but enabling unlimited calls with a single trunk. SIP trunks offer flexibility in reaching customers globally, while also avoiding costly setup and deployment of traditional systems. They provide analytics that traditional lines can't track, making maintenance and scaling easy once live. Companies like Twitter use SIP trunks to support their telephony infrastructure worldwide, leveraging Twilio's Elastic SIP Trunking solution for scalability and reliability.