PROVIDING SPECIAL SERVICES TO A CALLER CONFIGURED AS A VIRTUAL CALLED PARTY

摘要

Special subscriber services are implemented by providing operator functionality and service logic within a transit exchange (25) to equip it as a UPT serving node. A subscriber (22) connected to an end office (21) coupled to the transmit exchange (25) invokes the special services functionality (28) by signalling such as by means of a long switch hook flash. Once invoked, particular special services (31 and 32) may be selected by DTPMF or voice prompt signalling.