OpenIMS was started in 2004 by Fraunhofer FOKUS
. In 2006 it was published as Open Source and quickly became a reference for the NGN/IMS community.
Between 2008 and 2013, while the original development team took on the challenge of creating OpenEPC
, the Kamailio
team has imported the modules into the much updated SIP-Router development tree.
From 2015, in parallel with development of the OpenEPC++ commercial-grade products, Core Network Dynamics
took over the Open IMS Core project towards commercial-ready solutions for VoLTE.