Apr 17, 2014

What is SIP Trunking?

I’m a little confused about VoIP telephony terminology, specifically the term “SIP Trunking.”. Is SIP Trunking just another way to say VoIP, or does it refer to something else?

SIP trunking

"SIP trunking is a Voice over Internet Protocol (VoIP) and streaming media service based on the Session Initiation Protocol (SIP)[1] 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 facilities.[2] Most Unified Communications software applications provide voice, video, and other streaming media applications such as desktop sharing, web conferencing, and shared whiteboard."

SIP (Session Initiated Protocol) Trunking is the used to make VoIP calls, so it is a component of VoIP, but not VoIP itself. You can read a more thorough explanation here: 


Answer this