ClueCon: An Initiative of the FreeSWITCH Community to Empower the Worldwide VoIP Industry

Guest post by Inextrix

A “clue” is very important for any business, professional, or individual. The right “clue” for getting started, moving forward, and growing step by step to reach success is vital. ClueCon is the developers conference where these clues are collected by VoIP experts with years of experience and impressive vision, and presented to the VoIP industry to succeed in their journey. ClueCon is “by developers, for developers.” It is not just another corporate event where multiple keynote speakers deliver different sessions and the audience listens to them in a monotonous way. It is an interactive conference for VoIP, IP telephony, and other technology lovers.

Looking back at ClueCon: From Conference 1 to Now…

Originally, this conference was started back in 2005 by an ambitious team of Asterisk developers. The goal of the very first ClueCon was to bring different open source platforms together on a single stage, create a thriving environment, and build one of the strongest open source communities in the VoIP industry.

The very first event inspired the team to launch another open source telephony platform, which is now known as FreeSWITCH. Since then, year by year, the conference has taken place with key members of the FreeSWITCH community attending and hosting this event.

Top reasons to participate in the ClueCon Developers Conference

  1. To get that much needed clue

ClueCon has some great sessions, social networking events, demos, and more for its participants, hosted by industry leaders and experts. The thoughts shared during these keynote sessions or ideas discussed during social networking events can help entrepreneurs and business owners get the clues they need for their next innovative project. Aspiring VoIP developers and business owners will get the clues to succeed or move forward in this industry.

  1. To get support

ClueCon brings major players in the open source VoIP industry together. Company owners, expert VoIP developers, business enthusiasts, consultants, and community members participate in this event to exchange ideas and network to grow together. Interactive sessions give an open opportunity to know the speaker better and collaborate with them. This welcoming and warm environment offers ample opportunity to support each other and get supported.

  1. To build success tools

The ideas shared here will help you build the best success tools for your business. You can grab some futuristic technology product ideas to implement or you can get an answer to your long standing VoIP questions from telephony industry leaders. There is so much to explore and adopt for your career or business success. You can even find a partner that is as crazy as you are to live your dreams by building these tools together. Most importantly, many open source VoIP and telephony platforms and companies give some alluring offers that can help you build your tools with ease.

  1. To be part of a growing open source community

ClueCon brings together the top open source VoIP and telephony platforms like FreeSWITCH, Asterisk, Kamailio, OpenSIPs, ASTPP, and more on a single stage. You will be able to learn about all of these and many other open source communities and technologies. You can join these communities to convert your passion into a valuable contribution. These communities recognize the efforts of their contributors, which will further benefit you.

  1. To thrive together

ClueCon lives by the motto, “for developers, by developers.” In interactive events, you will be able to get support from the community and ever increasing VoIP industry to thrive.

  1. Unlimited fun

In this 4-day long conference, there will be multiple fun events to learn and laugh together. You will get a chance to be part of meet-ups and networking sessions. There is not only learning, but also a lot of fun that will rejuvenate you completely.

The emergence of FreeSWITCH as a platform and its USPs

FreeSWITCH and SignalWire are the main organizers of ClueCon, along with multiple other sponsors that contribute to the success of this conference every year. FreeSWITCH has been benefiting businesses for many years with the most robust, scalable, and secure telephony platform. 

Major USPs of FreeSWITCH as a telephony platform:

  • Ability to handle a variety of media with greater performance 
  • Ability to handle massive call volume and VoIP traffic with minimal hardware requirement and exceptional performance
  • Excellent multi tenancy support
  • Innovative features and modules
  • Modular structure
  • Outstanding stability 
  • Commendable failover support
  • And many more

More than 5000 businesses use this platform, including Zoom, Amazon, Vonage, and others. ClueCon is the place to meet visionary developers, community leaders, and business owners. 

How Inextrix Technologies uses FreeSWITCH to benefit its clients

Inextrix Technologies Pvt. Ltd is one of the sponsors of the ClueCon Developers Conference. The company has been using FreeSWITCH as one of the core technology platforms to offer custom telephony software development services to its clients. It has developed several multi tenant and digital VoIP solutions to help companies build sustainable businesses.

Inextrix is also one of the philanthropist companies that love open source VoIP communities. It has been managing and empowering an open source telephony platform for years – ASTPP: A Smart TelePhony Platform.

How ASTPP uses FreeSWITCH to benefit its clients

ASTPP is built using the core power of FreeSWITCH. It is the only VoIP telephony platform that supports the add-on concept to ensure the upgrade of software with new add-ons does not disturb the core functionality. Each add-on of ASTPP either has a VoIP solution or core functionality to add value to this smart platform. 

The stability, performance, scalability, and security could only have been incorporated into this platform with the help of FreeSWITCH. 

End note

In a nutshell, ClueCon has been inspiring professionals, bringing VoIP open source community leaders together, setting a stage to grow and succeed together, and taking advantage of the united power of technology, talent, and teamwork since its inception. 

In 2022, ClueCon is back again with more amazing keynote sessions, fun activities, coder games, roundtable discussions, meet-ups, demos, and much more. Book your calendar from the 17th to the 20th of October and be part of this event that brings digital revolution to all!    

What to Expect from #ClueCon2022

#ClueCon2022 is only a few weeks away! Join the FreeSWITCH team in Chicago for all your VoIP, WebRTC, cloud communications, and open source needs. Here’s what to expect from your favorite annual developers conference, October 17th – 20th:

Monday will kick off the week with the Coder Games hack-a-thon, hosted by SignalWire’s Abbi Minessale. Whether you want to code your way to the prize or you’re a builder at heart, there’s a challenge for everyone at the Coder Games! You can work as a team or go solo as you utilize the provided materials to build your creation. Tons of awesome prizes will also be handed out throughout the day.

This year there will be three challenges to choose from:

Maker Challenge: Are you an engineer? This year we are challenging you to build your own Arduino car and live stream an epic stunt! Kits, supplies, and code will be provided along with a few extra sensors and surprises to play and build with.

FreeCYCLED Hacks: Not a developer? Show off your skills by building a functioning projectile that tests your aim and accuracy as we challenge you to shoot various objects through different sized hoops.

SignalWire Challenge: If you want to win a cash prize for coding, this is the challenge for you. Create an open source application using SignalWire’s APIs/SDKs to receive $500! Because this is ClueCon, a key part of the submitted application needs to be communication (e.g. voice, video, dialing phone numbers and calling people or automated voice responses, or SMS/MMS).

When the day is over, we’ll all be getting together for a tasty Chicago meal at Jake Melnick’s Corner Tap. Come hang out and unwind after a long day of hacking for some good food and even better company!

The middle of the week will be packed with presentations from industry experts. Tuesday, Wednesday, and Thursday, catch informative talks and interesting demos by leaders in the world of open source and telecom. ClueCon is all one track, so you won’t have to miss out on anything. Click here to find out who’s speaking when! Use the breaks during the day to chat with our exhibitors or hang out with the team in the SignalWire lounge. 

Tuesday morning will include our keynote speaker, Anthony Minessale, so be sure to join us right away at 9:30. At lunchtime, choose your workshop – Daniel-Constantin Mierla will be leading a Kamailio lunch & learn, while SignalWire will be hosting a Campaign Registry workshop. The conference day will wrap up with an open source roundtable where we will be joined by experts from the world of open source telecom: Anthony Minessale, Brian West, Michael Jerris, Daniel-Constantin Mierla, Fred Posner, Liviu Chircu and Lorenzo Mangani. We’ll relax in the evening at the annual Gigabit reception, which this year will include a halloween costume contest! Join us for drinks, hors d’oeuvres, the annual Jam Session and ClueCon karaoke.

On Wednesday morning, we’ll be joined by some expert investors for our “Ask a VC” panel. Ever wonder what goes on in the mind of a Venture Capitalist? This panel of top-notch investors will speak about some of the key things they look for in a growing company, or entrepreneur, before they make a move. Get a HOMER workshop at lunchtime hosted by Lorenzo Mangani, and in the evening face off with your fellow attendees in the annual Poker Tournament! Beginners are more than welcome, and there will be board games if cards just aren’t your thing.

On Thursday, the final day of the conference, catch the last of the presentations and enjoy an OpenSIPS workshop over lunch led by Liviu Chircu. In the afternoon, we’ll wrap up the conference day with Dangerous Demos hosted by James Body, where danger is part of the fun and you never know who will crash and burn. Don’t forget your raffle tickets, because the final event of the day will be the grand prize drawing for a custom etched MacBook. 

If you stay Thursday night, there are a few more activities you can look forward to – we’ll be hosting a SignalWire roadshow onsite at the hotel after ClueCon is done! Friday, FreeSWITCH training is available for purchase, and in the afternoon, free SignalWire training is available with your ClueCon registration. Lunch is included if you attend both. Learn more about all the training and workshops here.

We can’t wait to see you there! 

Register now!

Jerry Yang

Jerry Yang – AME Cloud Ventures

Jerry Yang co-founded Yahoo! Inc. in 1995 and served on the Board of Directors until January 2012. While at Yahoo, he led several initiatives, including two of the biggest investments in the internet sector: Yahoo Japan and Alibaba Group. Mr. Yang currently works with and invests in technology entrepreneurs through AME Cloud Ventures, his innovation investment firm. Mr. Yang serves as a director on the boards of Workday Inc., Lenovo Group, and Alibaba Group, as well as on a number of his portfolio boards. He also serves on the Stanford University’s Board of Trustees and is a board member for the National Committee of US-China Relations. Mr. Yang is a member of the Brookings China Advisory Council, the Committee of 100, and the Council on Foreign Relations. Yang holds B.S. and M.S. degrees in electrical engineering from Stanford University. He is widely recognized as a visionary and pioneer in the internet technology sector.

Anthony Minessale


Anthony has 20 years of experience in software engineering and 15 of them are dedicated to telecommunications.  In 2005, Anthony founded FreeSWITCH, the Open-Source Software-Defined Telecom engine used by the Enterprise worldwide to power their platforms.

FreeSWITCH is a cross-platform software stack written in C and C++ that implements a fully-functional telecommunications engine. FreeSWITCH has a large active community and is used in most popular CPaaS platforms as the core telephony stack.

As an avid open-source advocate, Anthony has spent his career working to create a world where open-source software is not only an effective development model or a way to get free code but also a critical component in a successful business model. He believes that by uniting the two concepts, the developers of the world can learn to accelerate ideas and then take them to the next level.

Together with a team of the best minds in the industry, Anthony founded SignalWire in 2018. SignalWire has a primary mission to bring the complex technology behind real-time communication to the mainstream. Going 2 steps beyond where FreeSWITCH leaves off, SignalWire is solving the recurring problems faced by companies today who are trying to digitally transform their legacy hardware solutions. Likewise, new companies are sprouting up every day and it’s critical that these startups can solve their communications needs quickly and economically.

Lorenzo Mangani – QXIP

Lorenzo is founder of Amsterdam based QXIP BV, Co-Founder and Developer of the HOMER SIPCAPTURE Project. Formerly a Sound Engineer, Lorenzo has been deeply involved with telecommunications and VoIP for well over a decade and has contributed ideas, design concepts and code to many voice-related Open-Source and commercial projects specializing in active and passive monitoring solutions with his team at QXIP.

 An Introduction to QRYN 

Introducing QRYN, an open-source, high performance and cost-effective platform for logs, metrics and telemetry events natively integrated in HOMER/HEPIC and designed for the next-generation of Telecoms and RTC Enterprises.

Nickolay V. Shmyrev

Nickolay is a speech recognition researcher with more than 15 years of experience in speech technology.

Over the years Nickolay maintained and supported famous voice projects of the open source world – cmusphinx (pocketsphinx), festival, openmary, kaldi, voxforge. Helped beginners and companies to implement their own speech recognition and designed complex speech solutions.

Now Nickolay is leading the Vosk project to bring modern accurate, fast and flexible speech recognition to the open source – telephony, mobile applications, web and desktop.


SC Lee

SC Lee, Director of Product Management at Poly, is responsible for Poly’s Fully Cloud Managed and Programmable OBi Edition SIP Endpoints. With over 2 decades of experience developing and managing Communications and VoIP Products, SC Lee offers a unique blend of vision and knowledge. Prior to Poly, SC lead Product Management for WebEx for Developer ISV eco system at Cisco and cloud based contact center platform Dial-IQ at Velocify. SC Lee received his Bachelors of Science in Electrical Engineering from University of Wisconsin – Madison



Jerry Eisner

Jerry Eisner, ENP has been involved in public safety communications for over thirty-five years. His experience in many fields including: two-way radio systems, computer aided dispatch and records management systems, facility design and construction management, E9-1-1 customer premise equipment, E9-1-1 infrastructure, E9-1-1 database management, and Next Generation 9-1-1 has lead him to be a recognized industry subject management expert. He has had leadership roles in small projects and the largest projects in the industry. He joined RedSky Technologies in 2011 to lead the company’s efforts in the Next Generation 9-1-1. On APCO, NENA, NFPA, and the ATIS PSAP Outage WG.


Norm Brandinger

A strategic technology leader, Norm leverages his expertise in software and hardware to deliver value including revenue generation and customer acquisition. He has built systems and architected complex communication solutions to drive business growth. His work includes creating business plans that apply emerging technologies to launch VoIP provider platforms.


The Hitchhikers Guide to ClueCon

By Madison Ream

“Any people you may meet from time to time are merely the products of a deranged imagination.” Douglas Adams


Reflecting on the last 15 years of the ClueCon Conference we would like to present you with- drumroll please– The Hitchhiker’s Guide to ClueCon

Now, I know you may be thinking you’ve been to other conferences and felt like an outsider so why should this conference be any different? I’ll tell you why. Because we’re giving you this kick a** guide, that’s why.

Whether you’ve been to ClueCon all 15 years, or this is your first time ever, the attendee list is constantly changing and is always made up of new faces who are looking to meet and connect.

So, sit back, relax, and enjoy the ride as we begin our trek through the ClueCon-iverse!


Don’t Panic

The reason this blog is published in the form of a micro sub meson electronic component is that if it were printed in normal book form, a ClueCon hitchhiker would require several inconveniently large buildings to carry it around in. (You’re Welcome)

The story so far:

In the beginning ClueCon was created.

This made a lot of people very happy and has been widely regarded as a fantastic move.

Many races believed that it was created by some sort of god, though the Open Source people of ClueCon MMIV believe that the entire ClueCon-iverse was in fact sneezed out of the nose of a 3-headed being called The Trio, individually known as Anthony Minessale, Mike Jerris, and Brian West.

This is indeed how ClueCon was created.

The following statements will serve as your guide through the ClueCon-iverse. Use them well.

  1. Don’t Panic
  2. A Raspberry Pi, it says, is about the most massively useful thing a ClueCon-iverse hitchhiker can have.
  3. Forty-two, the answer to the ultimate question of life, the ClueCon-iverse and everything. This number will be very useful to you on your journey, DO NOT forget it.
  4. Technology has achieved some wonderful things of course, but I’d far rather be happy than right any day.
  5. For a moment, nothing happened. Then, after a second or so, nothing continued to happen. This is because the hotel wifi was crap. Not to worry, we have our own.
  6. The chances of finding out what’s really going on in the ClueCon-iverse are so remote, the only thing to do is attend the conference.
  7. Since we decided a few weeks ago to adopt the raffle ticket as legal tender, we have, of course, all become immensely rich.
  8. Seriously, Don’t Panic.
  9. In the end, it was the Thursday afternoons they couldn’t cope with, and that terrible listlessness that starts to set in about 3:30, when you know you’ve entered all your raffle tickets for the grand prize. You stare at the clock the hands that move relentlessly on to four o’clock, and you enter the long dark teatime of the unknown. Get ready, they may call your number.
  10. He was staring at the FreeCYCLED items with the air of one who is trying to convert Fahrenheit to centigrade in his head while his house is burning down.
  11. The storm had now definitely abated, he figured out how to move the ping pong ball.
  12. There is an art, it says, or rather, a knack to attending the conference. The knack lies in learning how to throw yourself into the unknown and inevitably come out better for it. Bring business cards.
  13. The last time anybody made a list of the top hundred character attributes of ClueCon Attendees, friendliness came in at number 1.
  14. Here’s an interesting little notion. Did you realize that most people’s lives are governed by telephone numbers? I’m sure you did if you’re part of the telecom community.
  15. Example of a conversation heard at ClueCon:

“You may not instantly see why I bring the subject up, but that is because my mind works so phenomenally fast, and I am at a rough estimate thirty billion times more intelligent than you. Let me give you an example. Think of a number, any number.”

“Er, five,” said Attendee 1.

“Wrong,” said Attendee 2. “You see?”


You can register and learn more about ClueCon here!  ClueCon is an annual technology conference held every summer on August 5-8th and hosted by the team behind the FreeSWITCH open-source project. Our primary focus is to gather various open source projects to discuss VoIP, open source software and hardware, telecommunications, WebRTC, AI, and IoT. We sit at the intersection of communication and technology and celebrate all things technical. Join us for our special hack-a-thon: the Coder Games where you can show off your skills by building a contraption out of everyday materials, coding a self driving car, and participating in our VoIP Game Show!

We love to learn and we love to have fun; our conference truly is for developers by developers.