SIP Trunking, however, uses the Internet to virtually connect to the PSTN, digitally transmitting data over existing IP networks.Įach SIP Trunk is essentially the virtual equivalent of one traditional phone line – but SIP Trunking allows for much more than just VoIP voice calling.Ī single SIP Trunk gives users access to multiple communication channels like voice calling, SMS texting, instant chat messaging, and even video conferencing all on the same virtual phone line. Though it might seem complicated, the way SIP works is really all in its name.
Plain Old Telephone Service (POTS) relies on copper wiring – a physical connection to the circuit-powered PSTN – to make and receive telephone calls. Put simply: SIP trunking is what gives standard, premise-based business phone systems access to the advanced features and benefits of VoIP. SIP Trunking is an application layer protocol that creates a virtual connection between the traditional Public Switched Telephone Network (PSTN) and cloud-based VoIP communications.
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