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Priority claimed from GB3445354Aexternal-prioritypatent/GB813338A/en
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Publication of BE543053ApublicationCriticalpatent/BE543053A/fr
H04Q3/0004—Selecting arrangements using crossbar selectors in the switching stages
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04M—TELEPHONIC COMMUNICATION
H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
H04M15/08—Metering calls to called party, i.e. B-party charged for the communication