Band width allocation on DPNSS networks.

摘要

A DPNSS (Digital Private Network Signalling System) link between two switching nodes comprises a number of trunk lines. These are grouped into trunk groups. Trunk Access Class (TAC) is a code used to differentiate different classes of traffic. In the switching nodes, a table exists which defines to which trunk groups access is allowed or barred by TAC. This means that bandwidth (or trunks) in the DPNSS link can be allocated by class of traffic. The present application relates to the dynamic allocation of bandwidth using the above technique. The grouping of trunks into trunk groups and the table which allows or bars access to trunk groups by TAC may be altered from time to time in the switching nodes at each end of the link by management command, to vary the allocation of bandwidth between classes of traffic in the DPNSS link. <IMAGE>