SIP Trunking

What is SIP Trunking?

sip trunking

SIP or Session Initiation Protocol is a standard for setting up telephone calls, multi-media conferencing, instant-messaging and other types of real-time communications via the Internet.

SIP refers to Session Initiation Protocol, the standard developed in the 1990’s by the Internet Engineering Task Force that is used to set up and terminate VoIP calls and generate dial tone. A SIP trunk, then, is a broadband Internet link that utilizes SIP to connect a company’s IP-based PBX to an Internet telephone service provider (ITSP). Instead of terminating the trunk directly at the IP-PBX, for security sake companies tend to terminate the trunks at a SIP-capable session border control system that acts as a firewall.

SIP trunking can establish sessions for features such as audio/videoconferencing, interactive gaming, and call forwarding – all deployed over IP networks.   It enables service providers to integrate basic IP telephony services with the Web, email, and chat services.

SIP trunking  is much faster, more scalable and easier to implement than H.323.   H.323 is a standard from the International Telecommunications Union  which serves as the defining foundation for a set of standards defining real-time multi-media communications for packet-based  networks – what are currently referred to as IP telephony.

Call Caleidoscope Solutions at 866-462-9259 to learn more about SIP trunking and how it can help optimize your communications needs.

EarthLink Business SIP Trunking and PRI

Level 3 Voice Complete Sip Trunking

Windstream Dynamic IP SIP

Level 3 SIP International Local Inbound

Level 3 SIP International Toll Free