Multimetering for telephone switching systems

Details Multimetering for telephone switching systems Multimetering for telephone switching systems

1974-07-26

1976-02-03

Claffy, Kathleen H.

179 7R, H04M 1512

Patent

active

039366081

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.

REFERENCES:
patent: 2960637 (1960-11-01), Luscher
patent: 3097266 (1963-07-01), Luscher

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