SIP Trunks

Trunking Built For All Your Business Communications.

SIP Trunks is currently being rolled out across our entire network and may not be available in every location. It is currently available in the state of New Jersey, Philadelphia, Wilmington and Chicago. - Check out our PRI Trunks page for a reliable voice solution.

Comcast Business SIP Trunking is a flexible and intelligent way to maximize voice services on your existing IP PBX that’s delivered over the largest VOIP network in the nation.* We provide SIP connectivity between a business's IP PBX and the network, and route calls between networks to ensure your phones are always on, even if disaster strikes.

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Call us any time, any day, and we'll be there.

We guarantee you will be pleased with our reliable service.


We Make Communicating Easy And Affordable.

A Voice Solution Powered By Your Internet Connection.
If you are a small, to mid-sized business, ready to revolutionize the way you communicate, SIP Trunks is the phone solution for you. We combine all the ways businesses communicate to each other and their customers – voice call, email, text, and chat – to offer a flexible, easy-to-use, and affordable unified communications solution for virtually any device.

What does SIP Trunks do for my business?

  • Leverage investments and reduce costs
  • Scalability without restrictions
  • Complete continuity and reliability
  • Access the latest networking and communications innovations
  • One business partner

View SIP Trunks Features >

Comcast Business Promise

Your company depends on Comcast Business services for its success, and we take that trust seriously. That’s we back our SIP Trunks service with a commitment to consistently exceed expectations

The Comcast Business Promise also includes:

  • 60-Day Money Back Guarantee limited to the monthly recurring fee paid for your first 60 days of service, excluding installation charges, fees, taxes or per-call charges
  • Dedicated project managers from design to install
  • Service Level Agreement for end-to-end coverage of Comcast-provided equipment, the local access network and the backbone network

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Trusted by more than 1 million businesses everyday.

We guarantee you will be pleased with our reliable service and the fastest speeds in business.

Call us any time, any day, and we'll be there to help you with all of your service needs.

You'll get a service consultation where we discuss your current Internet, Phone, and TV usage.

* Nation's Largest VOIP provider claim according to VoIP and UC Services and Subscribers: Biannual Worldwide and Regional Market Share, Size and Forecasts, 1st Edition, Infonetics Research Inc, 2012


SIP Trunks

Comcast Business SIP Trunks offers a reliable and cost-effective virtual phone line connection that stays on even when disaster strikes. SIP Trunking from Comcast Business utilizes the largest VoIP network in the nation to deliver scalable voice solutions.