Interaction of routing features in a telephone system

Details Interaction of routing features in a telephone system Interaction of routing features in a telephone system

1995-09-15

1998-04-07

Zele, Krista

Telephonic communications

Special services

Call diversion

379201, 379210, 379243, H04M 342

Patent

active

057374031

ABSTRACT:
Techniques for analyzing interactions of call routing features in a telephone system and implementing the features. Analysis and implementation are based on the recognition that a customer intends a call routing feature to apply to a telephone number which represents either a subscriber to which a call should be routed or a telephone number to which a call should be routed. From this recognition flow two classes of routing features: telephone features, which apply to telephone numbers representing telephones, and subscriber features, which apply to telephone numbers representing subscribers. How a given feature interacts with other routing features depends upon which of of the two classes it belongs to. Routing features may be implemented by keeping track of a telephone number which functions as a subscriber pointer and of one which functions as a telephone pointer and recursively invoking functions for subscriber and telephone features. The recursive invocations permit forwarding chains of any length. The techniques have also led to the development of a number of new call forwarding and call blocking features.

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