Please note that not all proposals were reviewed, for now this is a short list with a selection of accepted speakers. More will be published in the near future.


Alex Balashov

He is principal of Evariste Systems, Atlanta area, GA, USA, a consultancy specializing in open-source focused SIP service delivery solutions for wholesale and retail ITSPs and competitive carriers (CLECs). Alex is a member of Kamailio project management board, involved in application development and community engagement.

Andreas Granig

Andreas is working in telecoms since over 20 years. He developed and operated open source VoIP systems based on Kamailio and its predecessors in the early 2000s, founded Sipwise and created and managed the RTPEngine project. During this time, Andreas saw lots of good, bad and ugly aspects of developing and operating telco systems. This lead him to found Sipfront to support the industry with accessible and modern call test solutions.

Daniel-Constantin Mierla

He co-founded Kamailio in June 2005, aiming to build a solid SIP server project where openness to community and contributions has an important role, previously being core developer of SIP Express Router (SER) from its early beginning in 2002. He has a Master degree in Computer Science and Engineering from the Polytechnics University of Bucharest. His experience was accumulated working as consultant for Orange Romania, branch of French Orange mobile operator, and researcher in network communications at Fraunhofer Fokus Institute, Berlin, Germany.

His activity is done at Asipto, a company targeting to offer and build reliable services and solutions that benefit at maximum from Kamailio’s flexibility and features, sharing knowledge and expertise via professional trainings and consultancy. Daniel is leading the development of the Kamailio project and he is member of its management board.

Elena-Ramona Modroiu

She is a co-founder of Kamailio project, being also member of its management board. Her involvement in VoIP started by joining SER (SIP Express Router) in the spring of 2003, just after several months since the project was publicly released. She became one of the most active contributors, with key modules like avpops, diameter support, pdt, speeddial, uac, xlog. Elana-Ramona has a Master degree in Computer Science and Engineering from the Polytechnics University of Bucharest, Romania, completing the studies at Politechnics University of Valencia, Spain, and Fraunhofer Fokus Institute, Berlin, Germany.

Nowadays part of her activity involves VoIP and Kamailio consultancy at ASIPTO, focusing on innovative solutions and integration of SIP and VoIP with web2.0. She started Siremis Project – an open source web admin application for Kamailio – and has authored many tutorials about the Kamailio project, including Devel Guide, Pseudo-Variables Cookbook or Radius Integration.

Fred Posner

He is one of the most active Kamailio community members in USA, promoting the project at many conferences in North America, being also member of the management group. Fred developed and offers the APIBan.org as a free service to help preventing the unwanted SIP traffic from bad actors. He provides VoIP consulting services through The Palner Group and LOD Communications.

James Body

He is a veteran of the communications industry, having started his career in the days of thermionic valves and rotary dial telephones. James has used SIP Express Router, OpenSER and Kamailio in a variety of roles over the years and is an energetic advocate for Open Source Software. Today he is CEO of Telet Research, a Northern Ireland based company who build mobile network infrastructure to facilitate Multi Operator Neutral Host (MONeH) operation for anyone who wishes to run their own mobile Radio Access Network. James is also one of the founders of the CH4LKE Mobile network – a Community Interest Company located in the beautiful Chalke Valley in South West England.

Jan Lorenz

Since he was just a wee whipper snapper, Jan has been a programming and computer enthusiast. Today – a little bit older – he works at Pascom where he is primarily responsible for the development of pascom VoIP products – just as long as he is not doing something with video, among that being sure that video recording at Kamailio World is top quality.

Jiri Kuthan

Hee was founder and CTO of IptelOrg, the company that provided commercial services for SIP Express Router (SER). IptelOrg was acquired by Tekelec in 2015. Historically, he had been with FhG Fokus Institute, part of the initial team working to build SER, graduated from the University of Salzburg back in 1998. Nowadays Jiri is CTO of Intuitive Labs, focusing on VoIP security, monitoring and cloud infrastructure.

Lorenzo Miniero

He is the chairman and co-founder of Meetecho, a company providing both consultancy services and communication platforms. He got is degree and Ph.D at the Computer Science Department at the University of Napoli Federico II, where he started working on multimedia conferencing and met the colleagues with whom he co-founded Meetecho as an academic spin-off. He is an active contributor to the Internet Engineering Task Force (IETF) standardization activities, especially in the framework of real-time multimedia applications. He is most known as the author of the Janus WebRTC Gateway, a general purpose and open source WebRTC server-side implementation.

Markus Monka

He is the head of IT and VoIP infrastructure at sipgate.de, the company that offers products for at home, on the road and in the office. Since 2003 sipgate have been using SER, OpenSER and Kamailio, along with other open source projects. Beside landline networks, sipgate operate their own mobile core as MVNO, being connected directly with many carriers. With about 150 people that work in Düsseldorf in a lean and agile way, sipgate has supported Kamailio project to organize many of its community events, such as 10 Years SER, Kamailio Development Workshops and Kamailio World Conference.

Randy Resnick

He was the producer of VoIP Users Conference (aka VUC). VUC was a weekly live discussion about the people who are advancing Internet communications and other technologies with their visions. The conference has been running for over twelve years, happening every Friday at 12:00 noon US Eastern Time. Many Kamailio developers were frequent participants at VUC, several of them were invited guests in the past, presenting the project and typical use cases.

Thomas Magedanz, Prof. Dr.

He has been professor at the Technische Universität Berlin, Germany, leading the chair for next generation networks (www.av.tu-berlin.de) since 2004. In addition, since 2003 he has been Director of the Business Unit Software-based Networks (NGNI) at the Fraunhofer Institute for Open Communication Systems FOKUS (www.fokus.fraunhofer.de/go/ngni) in Berlin.

For 30 years Prof. Magedanz has been a globally recognized ICT expert, working in the convergence field of telecommunications, Internet and information technologies understanding both the technology domains and the international market demands. He often acts as an independent technology consultant for international ICT companies. In the course of his applied research and development activities he created many internationally recognized prototype implementations of global telecommunications standards that provide the foundations for the efficient development of various open technology testbeds around the globe. His current interest is in software-based 5G networks for different verticals, with a strong focus on edge computing, network slicing, and private industrial networks. The Fraunhofer 5G Playground (www.5G-Playground.org) represents, in this regard, the world´s most advanced Open 5G testbed which is based on the Open5GCore software toolkit (www.open5Gcore.org), representing the first reference implementation of the current 3GPP 5G Release 15 standards.

More details and a longer version of his activity are available here.

Tim Panton

He is the CTO at |pipe| – which built and licenses a lightweight cleanroom WebRTC stack for IoT devices. Prior to |pipe| he cofounded a web-based telephony company and subsequently sold the IPR to Tropo Inc., which was then acquired by Cisco. Before that, Tim was technical cofounder of Westpoint, a web security company recently acquired by Capita. Tim writes all the |pipe| software and manages product development and – leveraging all this experience – he helps define WebRTC standards at the W3C and IETF

He has spoken at various conferences, and one Youtube talk on webRTC has 100k views.

During the pandemic he built a bunch of video call apps for social good, under the banner of https://rendezvous.berlin. These include: an SMS triggered 1-2-1 mobile call app, a yoga teaching app with music, a pre-sales virtual visit app for conference centres – and many more.

Past projects have included training simulation for oil platforms, time management of a space telescope and running a mobile phone network at the Burning Man festival.

He can often be found tinkering with small robots.

Yacine Rebahi, Dr.

He has a PhD in mathematics and a Habilitation in computer science. Currently Yacine is senior researcher at Fraunhofer FOKUS. Prior to joining FOKUS in 2002, he worked at Ericsson Canada on Voice over IP (VoIP) related applications. Dr. Rebahi has been leading several research activities in the context of IP based emergency services (pure SIP, IMS) and Next Generation Networks/Next Generation Mobile Networks security in particular, DoS attacks detection, SPAM mitigation, fraud and service misuse detection, and security for the DIAMETER protocol.

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