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Publication of BE679015ApublicationCriticalpatent/BE679015A/xx
H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
H04Q3/54—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker in which the logic circuitry controlling the exchange is centralised
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04M—TELEPHONIC COMMUNICATION
H04M3/00—Automatic or semi-automatic exchanges
H04M3/22—Arrangements for supervision, monitoring or testing
H04M3/36—Statistical metering, e.g. recording occasions when traffic exceeds capacity of trunks