What is SIP Trunking?

SIP, or Session Initiation Protocol, is the standard communications protocol for voice and video in a Unified Communications (UC) solution across a data network. A SIP trunk replaces the need for traditional analog, T1-based Public Switched Telephone Network (PSTN) connections with termination instead provided over a company’s public or private Internet connection through a SIP provider.

The Benefits of SIP Trunking

  • Often referred to as Internet Telephony Service Providers (ITSP), and provides PSTN service on a per minute or channelized pricing model.
  • SIP Trunking uses VoIP to take advantage of shared lines, such as a company’s Internet connection, to allow more flexibility in communications
  • Cost savings and communications benefits of SIP trunking are substantial
  • No hardware, wiring, or circuit boxes to maintain for connection to the PSTN. Reducing multiple phone lines into a single point of entry
  • VoIP increases reliability of services by providing a level of redundancy
  • A phone number, or Direct Inward Dialing number (DID), is less expensive when purchased with a SIP Trunk.
  • When system failures and emergencies occur, SIP Trunking providers can reroute services to a redundant data line or forward the PBX to mobile phones to keep your business up and running.