![]() ![]() SIP is one of the specific protocols that enable VoIP. It includes a group of protocol technologies, of which SIP is an example. VoIP covers any and all phone calls made over the internet. VoIP is not a single solution it’s an overarching umbrella of telecommunications solutions. People often think SIP and VoIP are interchangeable, but VoIP stands for Voice over Internet Protocol. A typical SIP call travels from a device through a PBX, over an internet connection, to a data center switch, to the PSTN, to the person receiving the call. The industry needed something to keep up with the evolving features and call processing functions of the PSTN. In the 1970s, the telecommunications industry developed SIP Trunking. The PSTN is a circuit-switched network and requires a physical connection (i.e., copper wires) between two points to complete a call. How Does SIP Trunking Work?īefore SIP became a popular method of transmitting voice signals, the Public Switched Telephone Network (PSTN) fulfilled all telephone calls since way back in 1875. The IP-PBX is a gatekeeper to the outside world and the SIP trunk is the road leading in. The IP portion of IP-PBX stands for internet protocol meaning the technology uses the internet to travel and send the information. It’s a system that manages internal traffic between an organization’s telephones or other devices like fax machines, modems and credit card terminals. If you’re scratching your head about the term “IP-PBX,” don’t worry. It works with an IP-enabled PBX and replaces traditional telephone lines. Short for Session Initiation Protocol, it’s a method of sending voice and other Unified Communications over the internet. SIP Trunking technology supports your everyday chat, voice and video calls. ![]()
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