SIP Trunk Definition: What It Is and How It Works in 2026
A SIP trunk is a virtual bundle of phone lines that runs over the internet instead of physical copper wires, and it now underpins modern business calling at huge scale: over 350,000 VoIP calls are active worldwide every minute, and nearly 80% rely on SIP trunking as their signaling backbone (Didlogic on SIP trunk architecture). […]