what is SIP trunking?

[Rodney]

Hello,

It would be great if someone tells me what is SIP trunking?

Thank You

[Stephanie]

Session Initiation Protocol (SIP) trunking is the use of voice over IP (VoIP) to ease the connection of a private branch exchange (PBX) to the Internet.

[Aiden]

SIP trunking is a Voice over Internet Protocol (VoIP) 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).

[Priya Dialani]

A SIP trunk establishes a direct connection between an ITSP and your organization. It helps in extending the VoIP telephony beyond the firewall of the organization not even needing an IP-PSTN gateway. Moreover, SIP trunks can carry multimedia conferences, instant messages, user presence information, Enhanced 9-1-1 (E9-1-1) emergency calls as well as other real-time communications services.