What is SIP Trunking?
Session Initiation Protocol (SIP) is quickly becoming the standard term used within the Telecoms Industry for replacing traditional Analogue PSTN /ISDN connections with IP based solutions. However SIP is not a standard solution in the way that Analogue /ISDN PSTN have been deployed in the UK during the last 20 years. Because SIP is defined in a series of Requests for Comment (RFCs) papers, enabling suppliers of SIP equipment and SIP Network services to have interpreted and deployed their solutions in a variety of different ways. In summary SIP is not a standard and integrating SIP devices to a SIP Network is not automatically “Plug and Play”. When looking to connect an IPPBX or SIP Gateway to a SIP service provider you should ensure that the device has been compatibility tested with the Service Providers network and that all service features are fully supported.