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- Information technology (IT) and computers
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Samples in periodicals archive:
The second edition includes a new chapter on Next Generation Networks, including an overview on standardization, the architecture, and PTN/ISDN simulation services; a fully updated chapter on the Push-to-talk over Cellular (PoC) service; several expanded sections, including the role of the Open Mobile Alliance in the standardization process, IPv4 support in IMS, the IMS Application Layer Gateway and the Transition Gateway, and the presence data model; and updated material on the presence service, session-based instant messages with the Message Session Relay Protocol (MSRP) and the XML Configuration Access Protocol (XCAP).