SIP Trunking
SIP Trunking - Definition
A Session Initiation Protocol (SIP) connection is a Voice over Internet Protocol (VoIP) service offered by many Internet telephony service providers (ITSPs) that connects a company's private branch exchange (PBX/IP-PBX) telephone system to the ITSP public network via the Internet.
For enterprises wanting to make full use of their installed IP-PBXs and not only communicate over IP within the enterprise, but also outside the enterprise a SIP trunk provided by an Internet Telephony Service Provider to connect to the traditional PSTN network is the solution. Unlike in traditional telephony, where bundles of physical wires were once delivered from the service provider to a business, a SIP trunk allows a company to replace these traditional fixed PSTN lines with PSTN connectivity via a SIP trunking service provider on the Internet.
SIP trunks can offer significant cost-savings for enterprises, eliminating the need for local PSTN gateways, costly ISDN BRIs (Basic Rate Interfaces) or PRIs (Primary Rate Interfaces). Using a SIP connection may simplify administration for the organization as the SIP connection typically uses the same Internet access that is used for data.
SIP Trunking - Synonyms
SIP Trunking, SIP Trunk, SIP Connection