Title: Multimetering for telephone switching systems

Abstract: This invention relates to a method and means to provide local call multimetering in existing telephone systems with a minimum of changes in existing exchanges. It comprises sensing whether a call duration counter is connected to a cord circuit or not, and employs the result of this sensing operation to control an inhibiting circuit which, respectively, passes or stops the local metering pulses on their way to the subscriber's call counter. Sensing imposes a low power demand, thus sensing of the potential is sufficient. The principle may be used for toll multimetering. The first multimetering pulse will be suppressed.

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Inventors: Danielsen, Ole Svein (Oslo, NO)

Application Number: 492048
Filing Date: 1974-07-26
Publication_date: 1976-02-03
Assignee: International Standard Electric Corporation (New York, NY)
Primary Class(es): 377/14 379/124, 379/125
Other Classes:
US Patent Ref:

2960637	Nov, 1960	Luscher	179/7.
3097266	Jul, 1963	Luscher	179/7.

Other Refs: 1,024,148975,997

Mar, 1966	UK
Nov, 1964	UK

Primary Examiner: Claffy, Kathleen H.
Assistant Examiner: Brigance, Gerald L.
Attorney: Raden; James B., Warner; Delbert P.