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Kamailio v4.0.0 Released

March 11th, 2013 Posted in News

March 11, 2013: Kamailio v4.0.0 is out –  a special major release, shifting up the first digit in versioning number!

Besides bringing a lot of improvements and new features, the main reasons for this upgrade of version string are:

  • end of Kamailio – SER integration: for the 3.x release series, there was the same source code for Kamailio and SER, but with some duplicated modules and different database structures. Now the project is back to one set of modules, all the duplicated modules being integrated.
  • new transport layer: starting with this release, Kamailio supports WebSocket transport layer (both plain and secure), in addition to UDP, TCP, TLS and SCTP. WebSocket allow modern Web browsers to call between them using SIP for signaling.
  • Kamailio becomes the default application name (aka, default flavour) and what the public project is packaging. SER can be built manually, its flavour being kept for historical and maintenance reasons.

This release is a result of about 6 months of development and 2 months of testing. Continue to read full release notes at:

We look forward to meeting many from project community and potential users of Kamailio at our dedicated event – Kamailio World Conference – during April 16-17, this year in Berlin, Germany!

Enjoy SIP routing in a secure, flexible and easier way with Kamailio v4.0.0!

Kamailio Advanced Training, March 18-21, 2013, in Berlin

February 18th, 2013 Posted in News

Next Kamailio Advanced Training will take place in Berlin, Germany, March 18-21, 2013.

Last stable series is 3.3.x (Jun 18, 2012, see release notes), continues the work done within SIP-Router.org project. Among brand new features in v3.3.0, starting with the previous major versions, 3.0.0, 3.1.0 and 3.2.0 you can run mixed Kamailio (OpenSER) and SIP Express Router (SER) modules in the same SIP server instance, giving you the most powerful tools to build stable, high performance and features rich VoIP and Unified Communication platforms.

Next major release, v4.0.0, is in testing phase at this moment, expected to be out before the date of the training. It brings a vast set of new features, such as support for websockets, IMS extensions and full integration of former SER modules.

The class is organized by Asipto and will be taught by Daniel-Constantin Mierla, founder and core developer of Kamailio SIP Server project.

Read more details about the class and registration at:

Kamailio Development Workshop, Feb 14-15, 2013, Alicante, Spain

January 21st, 2013 Posted in News

Next Kamailio Development Workshop takes place in Alicante, Spain, during February 14-15, 2013. The event is organized by Asipto and University of Alicante, Master’s Degree in Telecommunication Engineering.

The coordinator of the workshop is Daniel-Constantin Mierla, co-founder of Kamailio project. The goal of the event is to present how to write your own code for Kamailio SIP Server. Note that it is not a training for VoIP administrators looking to learn how to configure and operate Kamailio-based SIP-VoIP platforms.

During the two days in the workshop, following topics will be approached:

  • internal architecture
  • SIP parser
  • memory manager
  • locking manager
  • database API
  • config file language interpreter
  • RPC interface
  • pseudo-variables and transformations framework
  • internal libraries
  • module interface – write your own extensions in C as modules
  • documentation docbook format

The price per attendee is 140 Euro. The participants going to Kamailio World will get a 30Euro discount to the registration fee for the conference in Berlin.

Number of seats to the workshop is limited and access will be granted in first come first served fashion. Registrations or requests for more details must be done via email at:

registration [at] kamailio.org

For people that happen to be in the area but not interested in programming C and/or not participating to the class, there will be a Social Networking Event during the evening of Feb 14, where we meet for food, drinks and discussions about SIP, VoIP and more.

Participation to the evening event is open and free for anybody, very likely to be a dinner or a pub session where every participant pays for himself/herself. Registration is still required so we know how many seats to reserve and send you the location of the event.

Kamailio World – Registration Open

January 7th, 2013 Posted in News

Registration for attending Kamailio World Conference is now open. You have the option to pay via bank transfer or using PayPal and credit cards. Proceed with the registration or read more details in the page:

By this time we are able to confirm as speakers several well known names in the real time communications industry and Kamailio project. Among them, the founders of Kamailio project: Daniel-Constantin Mierla and Elena-Ramona Modroiu, members of project’s management board: Andreas Granig, Carsten Bock and Henning Westerholt, core developer and author of websockets support: Peter Dunkley, the founder of Gemeinschaft PBX: Stefan Wintermeyer,  the producer of VoIP Users Conference: Randy Resnick or the head of research and development at Truphone: James Body.

New speakers will be selected and presented soon. Keep an eye on our website for news about the event!

Kamailio World – Conference & Exhibition

December 3rd, 2012 Posted in News

Kamailio project is announcing its first dedicated event – Kamailio World – to take place in Berlin, Germany, during April 16-17, 2013. The event is organized by Asipto in collaboration with Fraunhofer Fokus Institute. From Asipto team, Kamailio project co-founders Daniel-Constantin Mierla and Elena-Ramona Modroiu are the main coordinators of the event.

The conference is targeting to present commercial products and services built around Kamailio and related projects, as well as technical workshops of how to use Kamailio for various purposes. Along with the conference will be space for exhibition, that will allow companies to make demos and show cases for participants.

Besides Kamailio, you will have the chance to interact with other open source VoIP projects such Asterisk, FreeSwitch, Open IMS Core, SIP Express Media Server, Homer SIP Capture, Siremis, a.s.o.

For more details, visit the web site of the event:

Kamailio Advanced Training, Nov 12-14, 2012, Miami, FL, USA

September 5th, 2012 Posted in News

Next US and North America edition of Kamailio Advanced Training will take place in Miami, FL, USA, during November 12-14, 2012.

Last stable series is 3.3.x (Jun 18, 2012, see release notes), continues the work done within SIP-Router.org project. Among brand new features in v3.3.0, starting with the previous major versions, 3.0.0, 3.1.0 and 3.2.0 you can run mixed Kamailio (OpenSER) and SIP Express Router (SER) modules in the same SIP server instance, giving you the most powerful tools to build stable, high performance and features rich VoIP and Unified Communication platforms.

The class is organized by Asipto in partnership with IP Com and Terremark (a Verizon company), and will be taught by Daniel-Constantin Mierla, co-founder and core developer of Kamailio SIP Server project.

Read more details about the class and registration process at:

Kamailio Advanced Training, Nov 5-8, 2012, Berlin

September 5th, 2012 Posted in News

Next Kamailio Advanced Training will take place in Berlin, Germany, November 5-8, 2012.

Last stable series is 3.3.x (Jun 18, 2012, see release notes), continues the work done within SIP-Router.org project. Among brand new features in v3.3.0, starting with the previous major versions, 3.0.0, 3.1.0 and 3.2.0 you can run mixed Kamailio (OpenSER) and SIP Express Router (SER) modules in the same SIP server instance, giving you the most powerful tools to build stable, high performance and features rich VoIP and Unified Communication platforms.

The class is organized by Asipto and will be taught by Daniel-Constantin Mierla, founder and core developer of Kamailio SIP Server project.

Read more details about the class and registration at:

Kamailio at 11 Years

September 3rd, 2012 Posted in News

On 3rd of September, Kamailio project celebrates the 11th anniversary since the writing of the first line of code.

Daniel-Constantin Mierla of Asipto, co-founder and leader of the project, has posted a summary of what happened in the past year, with a reference period starting at the 10 years celebration event.

Two major release series were out, dozens of brand new features, including support for websockets in the development branch, new development team members that ensure an uniform project evolution. The article is completed with several statistics related to development – you can read it at:

Kamailio v3.3.1 Released

August 2nd, 2012 Posted in News

Kamailio SIP Server v3.3.1 stable is out – a minor release including fixes in code and documentation since v3.3.1 – configuration file and database compatibility is preserved.

Kamailio (former OpenSER) 3.3.1 is based on the latest version of GIT branch 3.3, therefore those running previous 3.3.x versions are advised to upgrade. There is no change that has to be done to configuration file or database structure comparing with older v3.3.x.

Resources for Kamailio version 3.3.1

Source tarballs are available at:

Detailed changelog:

Download via GIT:

  # git clone –depth 1 git://git.sip-router.org/sip-router kamailio  # cd kamailio  # git checkout -b 3.3 origin/3.3  # make FLAVOUR=kamailio cfg

Binaries and packages will be uploaded at:

Modules’ documentation:

What is new in 3.3.x release series is summarized in the announcement of v3.3.0:

Kamailio v3.3.0 Released

June 18th, 2012 Posted in News

Daniel-Constantin Mierla, of Asipto, co-founder and leader of Kamailio (OpenSER) SIP server, announced that Kamailio v3.3.0 is out – a new major release with a very large number of new features and improvements.

On June 18, 2012, Kamailio (OpenSER) 3.3.0 has been released – this release is a result of about 6 months of development and 2 months of testing from the teams of Kamailio (OpenSER) and SIP Express Router (SER) projects.

This version comes with 7 brand new modules in addition to a lot of fresh features in core and old modules. Continue reading full release notes at:

Enjoy SIP routing in a secure, flexible and easier way with Kamailio v3.3.0!

Asipto has recently announced two new training and consultancy public events where you can learn how to use Kamailio to build your rich communication services, read more about them at: