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Frens Jan Rumph
Profile: I am a researcher, technical consultant and software engineer based in Holland. I have specialized in Charging, Accounting and Billing architectures. From both a technical point of view (IETF, 3GPP, etc) and a business point of view (TM Forum, GBA).
Main interests: Telecom, Charging, Accounting, Billing, Service Orientation, Software Architectures, Software Engineering
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Furthermore, this is a personal weblog, the opinions expressed here represent my own and not those of my employer.
Fokus OpenIMS @ theimslantern
Quite some time ago I read a post at The IMS Lantern, which caught my eye: A Contribution from the Fraunhofer Institute FOKUS. It describes the OpenIMS core and OpenIMS playground from FOKUS. This was reason enough to try it at home :). It took some time to get round to this, but I’ve managed to get it up and running. I will provide some more details in my next post.
The article at The IMS Lantern (a great blog by the way):
Here is a first external contribution coming from the renowned Fraunhofer Institute FOKUS in Berlin. You will also find the main links featured in this post on the right side of the main page.
Here are excerpts from the email I received from Peter Weik:
My name is Peter Weik and I am working with the Fraunhofer Institute FOKUS in Berlin, Germany, an independent R&D organization for applied research in the telecommunications space. We have here been developing with own IMS prototypes and commercial IMS components now for several years in the context of the FOKUS Open IMS Playground (www.open-ims.org) in a true multi-vendor environment (www.open-ims.org/partner) for showing not only IMS interoperability (long before the first IMS interop events popped up) but also concepts around it (like e.g. application development or benchmarking of IMS components).
As you were asking in the latest post for links on what could be done, that exploit what IMS and SIP can offer to deliver innovative services I had to take on that opportunity as one of the lead developers of an open source project 
Well, you could spread the word even more via a blogpost that there is a free open source solution out there that has already enabled many IMS testbeds and developers: the Open IMS Core (www.openimscore.org).
The Open IMS Core is an implementation of IMS Call Session Control Functions (CSCFs) and a lightweight Home Subscriber Server (HSS), which together form the core elements of all IMS/NGN architectures as specified today within 3GPP, 3GPP2, ETSI TISPAN and the PacketCable initiative. The four components are all based upon open source software(e.g. the SIP Express Router (SER) or MySQL) and are available under the GPLv2. (You may know the project since it is also in the The March 2007 special issue of the IEEE Vehicular Technology Magazine on IMS, just three articles further onwards.) The whole idea behind the project is to enable IMS developments and to help an industry to adopt IMS concepts - all of it without huge investments necessary.
Besides sparking the development of two also freely available IMS clients (the IMS Communicator and the UCT IMS Client), it has also enabled some industry players, universities and R&D departments (see www.openimscore.org/quotes) and is used in current IMS interop events (e.g. at University of New Hampshire, http://www.iol.unh.edu/services/testing/voip/equipment.php#IMS).
But of course we are also looking at own application prototype developments as part of our recently started Open SOA Telco Playground (www.opensoaplayground.org). What is possible with IMS was shown at our last IMS workshop in November 2007 with the IMS Community Mashup with Facebook (http://youtube.com/watch?v=b1OwDD6cyBY).
Frens