Patent ID: 6055303
Filing Date: 2000-04-25
Classification: H04M,H04Q,Y10S

Abstract:
A telecommunications system comprising a plurality of local exchanges in which signalling and traffic data are routed between remote exchanges via a network service having routing code recalculation, which network service includes a plurality of transit nodes, said telecommunications system being adapted to provide a supplementary subscriber service involving an interaction between two subscribers in which:knowledge of a subscriber access code, used in a called subscriber local exchange, is required in a calling subscriber local exchange;said subscriber access code is generated by modification of a called subscriber routing code, used by said called subscriber local exchange; andsaid modification occurs in a transit node of said network service,each local exchange having an applications service element for providing said supplementary service, said telecommunications system being characterised in that at least some transit nodes include a relay applications service element which is adapted to relay signalling data between local exchanges and which includes translation means for converting a subscriber access code used at a called subscriber local exchange into a called subscriber routing code used by a calling subscriber exchange, and in that signalling data is transmitted between said calling and said called local exchanges via said relay applications element in said transit node.