Importance

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Abstract

Interworking between narrow band and broad band traffic in an ATM network is provided by a narrow band switch having a point to multipoint capability. Narrow band channels are mapped to time slots in broad band virtual circuits by providing a mapping between channel addresses and virtual circuit payloads. The narrow band traffic is interfaced to the broad band ATM network via a network of adaptive virtual junctors each of which comprises an n.times.64 kbit/s connection so that the cell assembly delay is reduced by a factor of 1/n. this overcomes the assembly delay problem without the need to resort to unproductive padding. Further, by providing dynamic capacity adjustment of the virtual circuits between the junctors, maximum use is made of the available capacity without the need for the permanent reservation of capacity which may be unused for much of the time.

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First Claim