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.



Transport stratum

The access network includes functions for the connection of user equipment to the network using a variety of technologies (such as cable, xDSL, wireless and optical) and also the aggregation of traffic from a number of users. For example, Supplement 6 to the Y.2000-series of Recommendations describes how the DSL (digital subscriber line) technology defined by the DSL Forum (now the Broadband Forum) can be used for NGN access. QoS control mechanisms, such as buffer management, queuing and scheduling, packet filtering, traffic classification, marking, policing and shaping, are supported in the access and core transport sections.


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