Tobia Castacdi; Mohammad Ilyas; Ryozo Ito; Moo Wan Kim; Lorenzo Miniero; Syed A. Ahson; Alessandro Ahirante; Dragos Vingarzan; Peter Weik; Jithesh Sathyan IP Multimedia Subsystem (IMS) Handbook - Taylor and Francis 2008 ISBN: 9781315219011 Source: EBOOK