Redundancy to the Maxx!

We are deploying the Kamailio IMS-Core and our TelcoSuite in a Carrier-Grade manner: We want to have absolutely maximum redundancy and the outages should not affect our users or the users of our customers. In order to achieve this, we use several different technologies: 1) DNS-SRV for server discovery of the user-agents This is a

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A little history on OpenHSS.org

Some of you may wonder about the OpenHSS project by me on sourceforge – i wonder, why so many people give it a 5* rating, since it was never completed…. 😉 A little history on the OpenHSS: In 2010, I’ve been working for Telefonica Germany for ~2 months, when they decided to cut 20% of

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IPv6: It’s nice, but…

Hi Everyone, No, it’s not (IPv6-)Friday, but anyway: I actually wanted to post this on Friday, but i was too busy… IPv6? Yes we’re ready! I’ve just modified our IMS-Core in order to speak IPv6 in the IMS-Core. I’ve modified the P-CSCF so he will actually translate IPv4 traffic (SIP and RTP) to IPv6. The

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Building the perfect voice-network

I know, it has been a long time since my last post here. We are living in busy times; right now I am travelling back from this years “Fuseco Conference” at Fraunhofer Fokus Institute in Berlin. The conference was quite interesting and it was a pleasure to meet, greet and talk to so many interesting

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Understanding Charging in the IP-Multimedia-Subsystem (IMS)

Before each service usage, the charging system must be asked for permission (credit authorization). The charging server must make a decision: Either authorize or deny the session. For postpaid scenarios this is fairly easy: The charging-server only needs to collect the usage data for processing it at the end of the month. As no realtime

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