SIP trunking is a voice over Internet Protocol (VoIP) technology and streaming media service based on the Session Initiation Protocol (SIP) by which Internet telephony service providers (ITSPs) deliver telephone services and unified communications to customers equipped with SIP-based private branch exchange (IP-PBX) and unified communications ...

The term trunk in SIP trunking refers to virtual phone lines that you can use to make phone calls over the internet to anyone with a phone number. SIP trunks not only carry voice calls, they can also be used for multimedia communication that combines voice, video and messaging services.

Sep 9, 2024 · A SIP trunk is the digital version of an analog trunk line that lets users make outgoing calls and receive incoming calls. Businesses often adopt SIP trunking to reduce phone expenses or take advantage of cloud-exclusive features.

Nov 16, 2024 · SIP trunking is a communications service provision that uses an application layer protocol to steer voice over IP connectivity between on-premises phone systems and the public switched...

Dec 5, 2023 · SIP trunking is a method of delivering telephone and other communication services over the internet using the Session Initiation Protocol (SIP). It replaces traditional analog phone lines, connecting the private branch exchange (PBX) to the internet.

Feb 15, 2024 · Discover what are SIP trunks, how they enhance business communication, and their benefits. Your ultimate guide to understanding and implementing SIP trunks.

Mar 18, 2025 · A SIP trunk is a virtual phone line that connects a company’s phone system to an Internet Telephony Service Provider (ITSP). It enables communication between a Private Branch Exchange (PBX) and other networks, such as the Public Switched Telephone Network (PSTN), another PBX, or WebRTC devices.

Nov 26, 2024 · SIP trunking is a method of delivering voice, video, and other unified communications over the internet using the SIP protocol. It replaces traditional telephone lines, allowing businesses to connect their on-premises phone systems to the public switched telephone network (PSTN) via the internet.

Mar 1, 2024 · SIP trunking, or Session Initiation Protocol trunking, is a method of sending voice and other unified communications services over the Internet. It works with an IP-enabled PBX (Private Branch Exchange), a private telephone network used within a company.

Discover how SIP Trunking cuts costs by moving your calls to the internet—read the article to learn more!