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SIP Trunking

A SIP trunk is an Internet Protocol based connection between a users’ telephone system and an Internet telephony service provider (ITSP) based on Session Initiation Protocol (SIP) as the communications protocol for signaling and controlling multimedia communication sessions such as VoIP telephone calls. In addition to VoIP calls, SIP trunks can also carry text messages (SMS/MMS), 9-1-1/E9-1-1 emergency calls, and other SIP based, real-time communications services.


How is Bandwidth Involved with SIP Trunking

Bandwidth is a Tier 1 carrier that provides SIP trunking services so our customers can deliver communication services. Bandwidth owns and operates the network and provisions a variety of communication services in addition to SIP Trunking. Bandwidth’s cloud-based communications API platform offers our customers the ability to integrate voice, messaging, 9-1-1 access, and phone numbers into their platforms. This gives businesses the ability to bring their customers closer to what matters most to them.


What Are the Benefits of Bandwidth’s SIP Trunking

Industry leaders such as Google Voice rely on Bandwidth because of our record of stability, innovation,and growth. And Bandwidth’s reliability is exceptional. We are one of a limited number of companies trusted to provide e911 in the entire United States. Bandwidth is able to meet these challenges because we’re a Tier 1 carrier. We own the network; billions of minutes each year run over our Nationwide CLEC. Compare that to most SIP providers, who are resellers that rely on several carriers; when you call their help desks, all they can do is open a ticket with their carriers and wait. But when you call Bandwidth, you’re talking directly to the people who can solve your problem—although, since we control everything on our networks, we already know about your problem and we’re working on it before you’ve picked up your phone. But that won’t happen too often; Bandwidth is committed to providing the best service and support to our customers. Bandwidth is among the nation’s largest and fastest-growing communication technology companies. We are the SIP provider you can count on to deliver affordability, scalability, and service.



Where We Talk About SIP Trunking

On our site

  • Bandwidth SIP Trunking
  • SIP Tag
  • Bandwidth SIP Trunking Systems Certified by ShoreTel
  • In our downloads

  • What is SIP Trunking
  • How to Choose a SIP Provider
  • SIP Trunking FAQ


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    Our lawyers have asked us to remind you that, in the event of any conflict between these defined terms and the defined terms included in any agreement between you and Bandwidth, the agreement controls.

    “Bandwidth” refers to Bandwidth Inc. and/or CLEC, LLC.