VoIP Providers! Take Note of Requirements to Interop With 3CX

3CX supports over 100 different SIP trunk providers globally. Applying and testing to become a 3CX supported VoIP provider is the best way to get your services out in front of 3CX customers and partners. To help you with this, we’ve prepared a technical document with the requirements for becoming a 3CX supported SIP trunk provider.

Technical requirements for VoIP providers

Getting your SIP trunks added to our list of supported VoIP provider pages will take a little work and some specific technical requirements. We break our requirements down into two separate categories:


  • Registration-based trunks
  • rInstance parameter support
  • Allowed IP address list
  • DTMF support for RFC2833
  • Proxy audio
  • Error codes


  • E164 number formatting
  • TLS / SRTP
  • T38 Support
  • SMS / MMS Support

Due to the fact that these categories are relatively lengthy and somewhat complex, we have prepared a breakdown of each point including descriptions and SIP message examples. If you are a VoIP provider and interested in becoming a supported provider, check out our VoIP provider documentation to review the mandatory and optional requirements.

Why become a supported provider?

Imagine getting your name and brand in front of over 600,000 companies. Becoming a supported provider means:

  • Your service will be included in the management console as one of the pre-configured SIP trunks in 3CX.
  • Your company will be listed on our supported VoIP provider pages.
  • We will test each version of our software against your service before release.
  • We will offer first-level support to our partners and customers using your service.

Ready to apply?

Head over to our easy online form to get the ball rolling on an existing new partnership.

Sourced from: 3CX Blog. View the original article here.

About Telecoms-Channel

Telecoms-Channel.co.za is your one-stop source for the latest news and insights from the telecoms industry in South Africa, where you get comprehensive coverage of the industry and keep up with the ever-evolving market landscape.

Whether you need to understand market trends, identify new opportunities, or stay informed of the latest developments, we have you covered.

In addition to bringing the best news together, we have access to an extensive supplier network that makes it easy for any telecoms company looking to tap into new markets or enter the telecoms industry. Take advantage of our expertise and contact us today to find your next partner!

Other posts you might be interested in

pexels andrea piacquadio 926390
Industry News

Explore Enreach UP’s breakthrough in unified communications – a game-changer for service providers and businesses alike!

Mobile Expense Management Software
Industry News

Revolutionize your mobile expense management with these top 5 tips – a must-read for efficient financial control!

pexels ketut subiyanto 4559589
Industry News

Discover 2024’s groundbreaking business communication trends: AI-driven, ultra-efficient, and personalized. A revolution in corporate communication awaits!

Aurora Innovation Joins Dstny Alliance Program to Enhance Healthcare Accessibility

Unlock the future of healthcare accessibility! Dive into our latest article highlighting the strategic collaboration between Aurora Innovation and Dstny in the pursuit of innovation and enhanced customer value. Read more now.

Single Request. Multiple Quotes. Save Thousands.