A Session Initiation Protocol (SIP) Trunk uses the Internet to make phone calls that access the Public Switched Telephone Network (PSTN). SIP creates the start and end points of a call, and manages the data by packet-switching between the two points. The Session Initiation Protocol is based on an architecture that begins with your business phone system, is carried partially by your internal telecommunications infrastructure, and partially by your Trunk service provider. It then ends with the phone system you are calling. Depending on the type of telephony you are using, there may also be various gateways within the architectural design. Don’t worry. You will not need to pass an exam on numerous SIP and VoIP acronyms! Our staff will explain all the options pertaining to your particular phone setup, and describe how each option can assist the growth of your company. SIP Trunking is a product, and as such, it comes with a variety of features. Not all SIPs look the same.