Tuesday, February 27, 2018

Kamailio v5.0.6 Released

Kamailio SIP Server v5.0.6 stable is out – a minor release including fixes in code and documentation since v5.0.5. The configuration file and database schema compatibility is preserved, which means you don’t have to change anything to update.
Kamailio v5.0.6 is based on the latest version of GIT branch 5.0. We recommend those running previous 5.0.x or older versions to upgrade. There is no change that has to be done to configuration file or database structure comparing with the previous release of the v5.0 branch.
Resources for Kamailio version 5.0.6
Source tarballs are available at:
Detailed changelog:
Download via GIT:
 # git clone https://github.com/kamailio/kamailio kamailio
 # cd kamailio
 # git checkout -b 5.0 origin/5.0
Relevant notes, binaries and packages will be uploaded at:
Modules’ documentation:
What is new in 5.0.x release series is summarized in the announcement of v5.0.0:
Note: the branch 5.0 is the previous stable branch. The latest stable branch is 5.1, at this time with v5.1.1 being released out of it. Be aware that you may need to change the configuration files and database structures from 5.0.x to 5.1.x. See more details about it at:
Check also the details of next Kamailio World Conference, taking place in Berlin, Germany, during May 14-16, 2018. Details with a selection of speakers and sessions have been published. The registration is open!
Thanks for flying Kamailio!

Monday, February 26, 2018

Kamailio v4.4.7 Released

Kamailio SIP Server v4.4.7 stable is out – a minor release including fixes in code and documentation since v4.4.6. The configuration file and database schema compatibility is preserved, which means you don’t have to change anything to update.
Kamailio v4.4.7 is based on the latest version of GIT branch 4.4. We recommend those running previous 4.4.x versions to upgrade either to v4.4.7 or even better to 5.0.x or 5.1.x series. When upgrading to v4.4.7, there is no change that has to be done to configuration file or database structure comparing with the previous release of the v4.4 branch.
Important: Kamailio v4.4.7 is the last planned release in 4.4.x series. From this moment, the maintained stable release series are 5.0.x and 5.1.x.
Resources for Kamailio version 4.4.7
Source tarballs are available at:
Detailed changelog:
Download via GIT:
 # git clone https://github.com/kamailio/kamailio kamailio
 # cd kamailio
 # git checkout -b 4.4 origin/4.4
Relevant notes, binaries and packages will be uploaded at:
Modules’ documentation:
What is new in 4.4.x release series is summarized in the announcement of v4.4.0:
Note: the branch 4.4 is an old stable branch, going out of mainenance with the release of v4.4.7 – if no major regression discovered, then no future releases will be made out of branch 4.4. The latest stable branch is 5.1, at this time with v5.1.1 being released out of it. The project is officially maintaining the last two stable branches, these are now 5.0 and 5.1. Therefore an alternative is to upgrade to latest 5.1.x – be aware that you may need to change the configuration files and database structures from 4.4.x or 5.0.x to 5.1.x. See more details about it at:
We hope also to meet many of you at the next Kamailio World Conference, May 14-16, 2018, in Berlin, Germany. The details for a selection of speakers and sessions has been already published and the registration is open. See more on the website of the event at:
Thanks for flying Kamailio!

Monday, February 19, 2018

Kamailio World 2018: Preview With A Selection Of Sessions

Less than 3 months till the start of the 6th edition of Kamailio World Conference, time if flying fast!
About one week ago we published the details for a group of accepted speakers, today we made a selection of sessions at the Kamailio World 2018. We had more proposals than we could accommodate, we are trying hard to fit in as many as possible, taking also in consideration the feedback from the participants at the past editions.
For now you can head to the Schedule page and see the details of 15 sessions, from both workshops and conference days:
A very divers range of topics, from using Kamailio for emergency services (112/911), scaling with Redis backend, deploying in a containerized environment with Docker and Kubernetes, how to migrate the SIP routing logic to rich KEMI languages such as Lua, Python or Javascript, unit testing for Kamailio and test driven deployments, to blockchains in telephony, using Kamailio and FreeSwitch together, or latest updates from Asterisk PBX.
The IMS/VoLTE workshop is going to show what you can do with latest Kamailio in mobile networks. And, of course, we have the very popular two sessions that never missed a Kamailio World edition: Dangerous Demos with James Body and VUC Visions with Randy Resnick.
The details for other speakers and sessions will be published in the near future, stay tuned!
Do not miss Kamailio World Conference 2018, it is going to be another great edition! You can register now!
Looking forward to meeting many of you at the next Kamailio World Conference, during May 14-16, 2018, in Berlin, Germany!

Friday, February 16, 2018

DB_REDIS – Kamailio Database Connector Module For Redis Serve

Andreas Granig from Sipwise has pushed recently a new module for Kamailio, respectively db_redis, which implements database connector API. The readme of the module can be found at:
Practically it should be possible to use db_redis module instead of any other database connector module, such as db_mysql or db_postgres., for modules like usrloc, auth_db, a.s.o.
Redis is know to be very fast key-value storage system, with very good replication and redundancy option, already popular in Kamailio ecosystem  – see also ndb_redis or topos_redis modules.
Andreas is testing the performances of Kamailio with db_redis versus other popular database connectors, the results are very promising in a boost of performances.
As a matter of fact, Andreas will give a presentation about this topic at Kamailio World Conference 2018, a session you should not miss if scalability is important for your VoIP/RTC service! See you there!
Thanks for flying Kamailio!

Thursday, February 15, 2018

Testing Kamailio On RaspberryPi 3

Stefan Mititelu has shared some statistics about stressing Kamailio on a Raspberry PI 3 device. All the relevant details were made available at:
Here are device’s characteristics
An over-clocked Raspberry PI 3 running Raspbian Stretch with a U3 MicroSD card.

pi@raspberrypi:~ $ cat /etc/issue
 Raspbian GNU/Linux 9 \n \l
 pi@raspberrypi:~ $ uname -a
 Linux raspberrypi 4.9.59-v7+ #1047 SMP Sun Oct 29 12:19:23 GMT 2017 armv7l GNU/Linux

 pi@raspberrypi:~ $ cat /boot/config.txt
 ...
 total_mem=1024
 arm_freq=1300
 core_freq=500
 sdram_freq=500
 sdram_schmoo=0x02000020
 over_voltage=2
 sdram_over_voltage=2
The tests ran for 60 seconds, repeated a couple of times, and they were done in a LAN, using PI’s ethernet interface, running Kamailio 5.1.1.
  1. REGISTER/200, __with db_text__
    – at 900 cps test did finish: all UAC registered; pi htop threads were ~15-20%
    – at 950 cps test did NOT finish: got “Overload warning” on my UAC/UAS SIPp testing machine
  2. INVITE/180/200/PAUSE(3sec)/BYE/200, __with no media__
    – at 370 cps test did finish: all UAC->UAS calls completed; ~150 “180 Trying” Unexpected-Msg on UAC side; pi htop threads were ~50%
    – at 380 cps test did NOT finish: few(~5) UAC->UAS calls not completed; pi htop threads were ~50%
The results are really impressive (even if the used testing configs were really basic ones)!!!
Moreover, I think that I’ve reached the limit of my current SIPp testing machine, but not of PI’s.
Should you have something interesting to share about using Kamailio, do not hesitate to contact us, we will gladly publish an article on our website.
Thanks for flying Kamailio!

Wednesday, February 14, 2018

Transcoding With Kamailio And RTPEngine

The developers at Sipwise were very engaged and creative lately, bringing major features in the Kamailio ecosystem:
  • audio transcoding support in RTPEngine by Richard Fuchs
  • database API connector implementation for Redis by Andreas Granig (expect a post here about it very soon as well as a presentation at Kamailio World Conference 2018)
Sipwise is one of the oldest companies involved in Kamailio project, since SER/OpenSER times — likely out there in the community are very few that used (or even heard of) the OpenSER Configuration Wizard published by Andreas Granig around years 2006-2007, but that helped many to start building Kamailio-based VoIP platforms back in those days. Andreas, the CTO and one of the founders of Sipwise, has been member of Kamailio management team for more than 10 years now.
Back to the topic of this article, RTPEngine introduced recently the capability of transcoding audio channel for SIP/VoIP calls. It relies on ffmpeg project, therefore the it supports the relevant codecs out there, respectively:
  • G.711 (a-Law and ยต-Law)
  • G.722
  • G.723.1
  • G.729
  • Speex
  • GSM
  • iLBC
  • Opus
  • AMR (narrowband and wideband)
Another feature added along with the transcoding was the support for repacketization of the RTP traffic, which can help in increasing QoS over long distance connections.
These features are immediately available even on old releases of Kamailio (such as v5.0.x or 5.1.x), the control protocol for RTPEngine being flexible to support such new commands. The commands are not yet documented inside Kamailio’s rtpengine module, but you can read more about them in the README of RTPEngine application:
It is no wonder that this topic became a hot discussion on Kamailio’s sr-users mailing list.
Along with its old popular feature to gateway between WebRTC DTLS-SRTP and plain RTP (decryption/encryption) as well as the high throughput capacity with in-kernel RTP packets forwarding (useful for NAT traversal or QoS), RTPEngine is nowadays a must-have component in modern Kamailio-based RTC platforms.
Here we express our great appreciation for all these contributions by Sipwise and their continuous support for Kamailio project over the years!
Exciting times ahead for Kamailio project, a lot of new features are baking as you read here! Join us at the 6th edition of Kamailio World Conference, May 14-16, 2018, in Berlin, Germany, to meet the developers and learn more about using Kamailio and related projects. Registration is open!
Thanks for flying Kamailio!

Thursday, February 8, 2018

Kamailio World 2018 – First Group Of Speakers

The details for the first group of speakers at Kamailio World Conference 2018 have been published. So far they come from three continents: Europe, North America and Asia, many presenting for the first time at our event.
The two sessions present at all editions so far will be there also in 2018, at our 6th edition, respectively Dangerous Demos with James Body and VUC Visions with Randy Resnick.
Besides covering various use cases for KamailioAsterisk or FreeSwitch, the sessions go into WebRTC, VoLTE/IMS, IoT, blockchains for telecommunications or scalability using NoSQL data storage systems. Definitely another edition with very interesting content – soon we will publish more details about the sessions as well.
See more about the speakers at:
You can register now to benefit of the early registration price:
Looking forward to meeting many of you at Kamailio World Conference, May 14-16, 2018, in Berlin, Germany!
Thanks for flying Kamailio!

Wednesday, February 7, 2018

Kamailio Administration Group

After several discussions at some of the past IRC devel meetings, finally we started to build a team to be involved more actively in the administration of Kamailio. The project has grown steadily, not only in terms of code, but also packaging, continuous integration, social networking interactions as well as participation to events world wide.
For a better coordination and ability to handle related tasks, we invited the most active developers and community members to join so called Kamailio Administration Team, the initial details about it are published as part of management page on kamailio.org:
Some more details about its rules and purpose:
It will still take some time to get it properly rolling, more or less now looking to see if the community has suggestions/improvements on what can be done in these aspects – you can just write to sr-users mailing list.
Thanks for flying Kamailio!

Tuesday, February 6, 2018

Kamailio Management Group Updates

Markus Monka has just replaced Marcus Hunger in Kamailio project management group. Marcus (still at sipgate) has moved to work more on frontend applications than backend, no longer interacting with Kamailio project.
Markus Monka has managed the VoIP operations at sipgate for more than 15 years, helping the project over the years with various resources, mainly in respect of organizing events and testing infrastructure, sipgate being one of the oldest VoIP services using Kamailio (since first releases of SER). The change is reflected now on the website:
Warm welcome to Markus and many thanks to both of them for what they did so far for Kamailio project!
Thanks for flying Kamailio!

Thursday, February 1, 2018

Using @kamailio on Twitter

With the involvement of Daniel-Constantin Mierla (me), Henning WesterholtFred PosnerOlle E. Johansson and the assistance from Twitter SupportKamailio SIP Server project is now able to use @kamailio handle on Twitter.
So far, Olle E. Johansson used @kamailioproject for pushing news about the project, because @kamailio was not available. However, there were situation when even people close to the project mistakenly referred to @kamailio when willing to actually mention Kamailio project (e.g., https://twitter.com/giavac/status/731398977053179905).
Kamailio is a registered trademark in European Union, process completed by Henning Westerholt many years ago. The main domains kamailio.org and kamailio.com are registered by Daniel-Constantin Mierla. There is no other relevant organization having the same name, therefore such situation was affecting the Kamailio brand. Twitter Support was open to listen to our story and finally we were assigned the @kamailio name.
The process concluded with renaming @kamailioproject to @kamailio, the old followers, tweets and discussions were kept intact. So if you followed @kamailioproject in the past you should see you are following @kamailio now.
If you haven’t followed us yet, you can now be up to date with news about the project via @kamailio.
The @kamailio account is going to be shared-managed by several people, more details will be exposed soon.
Thanks for flying Kamailio! 
We hope to see you at Kamailio World Conference 2018 (May 14-16, in Berlin, Germany).