Voice

Session Initiation Protocol (SIP) trunking is the use of voice over IP (VoIP) to facilitate the connection of a private branch exchange (PBX) to the Internet. Unlike 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 and connect their IP-enabled PBX phone systems to the network via IP over a business grade data service such as fibre optics. The major benefit of SIP trunks is that it does not need the traditional Telco infrastructure to connect calls, therefore service and equipment charges (line rental) and call rates are very inexpensive.