Zusätzliche Informationen zu den Themen IMS und SIP/SIMPLE finden sich hier:
Tech-invite
Wikipedia IMS overview
http://en.wikipedia.org/wiki/IP_Multimedia_Subsystem
Lucent/ITU IMS overview
http://www.itu.int/ITU-T/worksem/ngntech/presentations/s1-towle.pdf
Fraunhofer-Fokus IMS Lab
http://www.fokus.fraunhofer.de/ims/
http://www.fokus.fraunhofer.de/ims/opensoaplayground/?lang=de
ftw IMS tutorial
IETF SIP working group
http://www.ietf.org/html.charters/sip-charter.html
IP Multimedia Subsystem in OMA (IMS in OMA) V1.0
http://www.openmobilealliance.org/technical/release_program/ims_v1_0.aspx
RFC: SIP Protocol
http://www.rfc-archive.org/getrfc.php?rfc=3261
BEA Weblogic SIP Server (free evaluation version available)
