The FOKUS Open SIP AS - A Service Platform for NGN. - Elmar Fasel; Karsten Knuettel; Thomas Magedanz (KiVS Kurzbeiträge und Workshop, 2005)

The IMS Playground @ Fokus - An Open Testebed for Next Generation Network Multimedia Services. - Thomas Magedanz; Dorota Witaszek; Karsten Knuettel (TRIDENTCOM, 2005)