SIP Trunking Providers - Compare Best SIP VoIP Phone Services

SIP Trunking (Session Initiation Protocol) is a VoIP communication system using your internet connection to make and receive large volume of phone calls with optimal functionality. SIP services are offered by most VoIP providers for both small and large businesses. SIP integrates your voice, video, data and internet service into a single line. “Trunking” is a term that dates back to the days of telephone service to describe a large number of telephone users sharing a smaller number of communication paths. With SIP, all calls are local calls, and you don't even need a phone line. Click here for the complete explanation of SIP Trunking.

Before SIP, you needed a Primary Rate Interface (PRI) to carry voice, data, and video over one line. A PRI is a physical device that you had to purchase along with the calling plans from your phone provider. With SIP, your provider sets up a proxy server, also called a SIP proxy, which provisions incoming, outgoing, and PBX calls. Nothing is on-site. Instead of an IT team, or IT contractor, your provider takes care of all technical support, saving you time and money.

If you have to temporarily shut down a location, SIP trunks will automatically reroute calls to other locations and extensions. Let’s say there is an unexpected power outage during the day. Calls can be rerouted to a satellite office.

For companies that have an international presence, or are looking into outsourcing, SIP can take your business to the next level. You can have customer service staff spread across the country or even the world.