Patent ID: 6873699

Claim:
A network linkage type private branch exchange system, comprising: a plurality of private branch exchanges; a plurality of telephone network interfaces for relaying data received from callers between a plurality of telephone networks and each said private branch exchange; a plurality of terminal devices for transmitting said data between each said private branch exchange and a plurality of operators; a plurality of computers each connected to each said private branch exchange for conducting predetermined processing based on said data; and a data communication line to which each said private branch exchange is connected, wherein said private branch exchanges are arranged and adapted to operate in an operating mode in which data intended to be processed in one of said computers connected to a first one of said private branch exchanges is routed through said first one of said private branch exchanges, through said data communication line, and through a second one of said private branch exchanges, to a second one of said computers connected to the second one of said private branch exchanges for processing.