Converging Networks

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This Handbook presents the ITU-T Recommendations on next generation networks in the context of the ongoing convergence of the telecommunications and media industries.



Service stratum

IMS is a good example of the cooperation between a number of standardization organizations in the production of a system specification. IMS was originally defined by the 3GPP as a system based upon the IETF SIP (session initiation protocol) specifications that were then adopted by ETSI TISPAN and the ITU-T for use in NGN.


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