Among topics to be approached:

• internal architecture of Kamailio/SER SIP server
• SIP parser
• memory manager
• locking manager
• database API
• configuration file language structure and interpreter
• RPC/MI control interface
• pseudo-variables and transformations framework
• module interface
• how to write your own extensions in C as module
• inter-module APIs – transaction management, SIP SIMPLE Presence, asynchronous processing, a.s.o.
• working with embedded interpreters for high level programming languages: Lua, Perl, Python

Who should attend:

• VoIP/Telecom developers intending to write own extensions to Kamailio SIP Server
• VoIP/Telecom administrators interested to learn about the internals of Kamailio SIP Server in order to know how to optimize the SIP routing and build proper configuration file
• VoIP/Telecom professionals interested to learn about Kamailio SIP Server, how and where can it be used, its current features and future development

The event is a good place for networking with other professionals from VoIP/Telecom and Real Time Communications fields, past similar events having dozens of attendees.

The price per attendee is 250 USD.

Number of seats is limited and access will be granted in first come first served fashion.

Registration or requests for more details can be done via:

• registration web form – click here for it
• or email to: registration [at] lists.sip-router.org .

Here are some stats I thought of:

• type of usage: production, evaluation (testing), research
• number of subscribers (phone lines)
• percentage of phones behind NAT
• number of calls per month
• number of call minutes per month

I am not looking for exact numbers, but rough estimation (e.g., about 10 000 phone lines, …). Of course, some of the metrics don’t apply always (e.g., if you do termination routed through SIP server, you don’t have subscribers, but just calls traffic). Those doing deployments, can make one summary of statistics for all instances. You may send other “interesting” statistics you think they worth publishing.

Again, this is voluntary, naming is not required. I hope only those giving real number will write back — I will try anyhow to figure out if someone is just dumping fantasy numbers. If privacy is really a big concern, from case to case, everything can be done under NDA.

Send the statistics or contact me for further details per email at: <daniel [at] kamailio.org>. Many thanks in advance to those that are going to participate in this survey!

• http://sip-router.org/10-years-ser/

There is no participation fee for the conference day, registration can be done via web form. At this moment there are about 20 special guests and 14 speakers, with participants from 15 countries.

If you use SER-based applications (like ser, openser, kamailio, openimscore, …) and want to present about it or you want to sponsor the event in exchange of advertising through project channels, contact us via event registration form.

It was done by the same developer that started the project and committed the 1st one, Andrei Pelinescu-Onciul:

git log --pretty=format:"%h%x09%an%x09%ad%x09%s" --reverse | head -1

512dcd9    Andrei Pelinescu-Onciul    Mon Sep 3 21:27:11 2001 +0000    Initial revision

The 15000th one is:

git log --pretty=format:"%h%x09%an%x09%ad%x09%s" --reverse | head -15000 | tail -1

8a90dd3    Andrei Pelinescu-Onciul    Sat Jun 11 11:24:05 2011 +0200    core: remove unused variables + coding style

This number of commits is counted only for development branch (GIT master), thus it does not take in consideration the branches of stable releases. That will make the number of commits in the project higher, but the target was to show only the main stream development evolution, not the fixes in stable branches.

Note that there are personal developer branches holding code commits done in the past and to be merged in GIT master branch in the near future, so the number 15000th commit may be different when checking again later. However, as a marker in the history of the project, Andrei’s commit is the first in master branch to hit the 15000. The link to the commit via web GIT viewer is here.

• SER’s 15000th code commit

You can also check the history of SER/Kamailio commits tracked by Ohloh here.

Be ready to party with us in September at the 10th project anniversary and watch us for the 20 000th commit!

Kamailio SIP Server v3.1.4 stable is out – a minor release including fixes in code and documentation since v3.1.3 – configuration file and database compatibility is preserved.

Kamailio (former OpenSER) 3.1.4 is based on the latest version of GIT branch 3.1, therefore those running previous 3.1.x versions are advised to upgrade. There is no change done to configuration file or database structure.

Resources for Kamailio version 3.1.4

Source tarballs are available at:

• http://www.kamailio.org/pub/kamailio/3.1.4/src/

Detailed changelog:

• http://www.kamailio.org/pub/kamailio/3.1.4/ChangeLog

Download via GIT:

# git clone –depth 1 git://git.sip-router.org/sip-router kamailio
# cd kamailio
# git checkout -b 3.1 origin/3.1
# make FLAVOUR=kamailio cfg

Binaries and packages will be uploaded at:

• http://www.kamailio.org/pub/kamailio/3.1.4/

Modules’ documentation:

• http://www.kamailio.org/docs/modules/3.1.x/

What is new in 3.1.x release series is summarized in the announcement of v3.1.0:

• http://www.kamailio.org/w/kamailio-openser-v3.1.0-release-notes/

If you want to see what is new in development version (to become the future major release v3.2.0), visit the web page:

• http://sip-router.org/wiki/features/new-in-devel

As part of the research work, Jan could also gather some figures about capacity and performances of v3.0 with a quite complex configuration file (involving authentication and NAT traversal as well).

You can read the paper about energy efficiency at:

• Green VoIP Article (PDF)

The draft notes about capacity and performances of v3.0 are available at:

• Performances and Capacity for v3.0

Some interesting results:

• one instance of SIP server with 500 000 online users (mixed users – behind and not NAT routers) – consumed energy 210W
• one instance of SIP server with 1 000 000 online users (no NAT involved) – consumed energy 190W
• on a 32-bit machine with 4GB of memory and with 2.5GB reserved for SIP server, the server could support 43 000 simultaneous TLS connections – consumed energy 209W
• one SIP server instance with 80 000 permanent TCP connections, the SIP server could still handle at least 1000 requests per second and a connection arrival rate of 1000 new connections per second, done for 20 000 new connections. CPU load generated by the SIP server was from 6% to 8%.

I added a new section to the draft notes to list the enhancements done for the latest stable release (v3.1.x) that contribute to performance improvements, like asynchronous TLS, fine tuning of memory for TLS connections and raw UDP sockets.

Asipto and Sipwise, two companies involved in the development and management of Kamailio and SIP Router projects, announced today the joint venture to create complete and competitive IP Telephony product using Kamailio as core component for SIP routing.

The venture focuses on recently announced SIP:Provider platform targeting IP telephony operators, delivered as out of the box system with features such us authentication, authorization, NAT traversal, call forwarding, call baring, voice mail, web interfaces for monitoring, administration and user portal, post paid billing, interconnection for PSTN with least cost routing, a.s.o.

SIP:Provider CE version is provided free of charge, under open source license, you can install it easily via Debian packages or images for VirtualBox and VMWare. The target is to fill the gab between raw components such as Kamailio and full operational IP telephony system, that one can download, install and then it is ready to go to operate telephony services, without messing to put together various applications and having to understand SIP.

You can read the announcement here.

The fourth edition of yearly Kamailio Awards was published, covering the excellent year 2010.

The awards is a list built by Daniel-Constantin Mierla, co-founder and core developer of Kamailio & SIP Router projects, trying to show the best that happened last years, structured in several categories, such as news and blogging, business initiatives, new additions, development and advocating, educational institutes and innovation.

See the list of awarded people, companies and projects at Kamailio 2010 Awards site.

If you are using Kamailio for providing communication services or you offer services for Kamailio such as consultancy, development or support, contact us and tell about your use case and we will be glad to add you in our References or Business Directory pages.

SER and Kamailio SIP Server v3.1.2 stable are out – a minor release including fixes in code and documentation since v3.1.1 – configuration file and database compatibility is preserved.

Kamailio and SER 3.1.2 are based on the latest version of GIT branch 3.1, therefore those running 3.1.0 or 3.1.1 are advised to upgrade — there is no change required to be done to configuration file or database.

SIP Express Router (SER) is not specially packaged, but it is the same source code as Kamailio, it is just built with a different binary name and its default configuration file uses different set of modules.

Resources for Kamailio version 3.1.2

Source tarballs are available at:

http://www.kamailio.org/pub/kamailio/3.1.2/src/

Detailed changelog:

http://www.kamailio.org/pub/kamailio/3.1.2/ChangeLog

Download via GIT:

# git clone –depth 1 git://git.sip-router.org/sip-router kamailio
# cd kamailio
# git checkout -b 3.1 origin/3.1
# make FLAVOUR=kamailio cfg

Binaries and packages will be uploaded at:
http://www.kamailio.org/pub/kamailio/3.1.2/

Modules’ documentation:

http://www.kamailio.org/docs/modules/3.1.x/

What is new in 3.1.x release series is summarized in the announcement of v3.1.0:

http://www.kamailio.org/w/kamailio-openser-v3.1.0-release-notes/

SIP Express Media Server (SEMS) released 1.3.1 with several bug fixes and improvements since 1.3.0, among them:
– fixed CMake build scripts
– fix for architectures w/o atomic built-in functions
– add lost accept_fr_without_totag sample cfg option
– fixed missing CRLF in transfer header

The tarball can be downloaded from:
http://ftp.iptel.org/pub/sems/sems-1.3.1.tar.gz

SEMS is a lightweight media server that can be used along with Kamailio to provide back-to-back user agent functionality, voicemail, IVR, audio conferencing, a.s.o.