Telephone system and method operated from central office loop cu

Details Telephone system and method operated from central office loop cu Telephone system and method operated from central office loop cu

1988-07-11

1989-08-22

Schreyer, Stafford D.

Telephonic communications

With usage measurement

Call charge metering or monitoring

379132, 379150, H04M 1700, H04M 106

Patent

active

048603457

ABSTRACT:
A telephone having a hook switch is coupled to tip and ring conductors for receiving loop current from a central office responsive to an off-hook condition at the hook switch. The electronic circuity within the telephone for facilitating various functions is powered entirely from the loop current flowing from the central office during the off-hook condition.

REFERENCES:
patent: 4719648 (1988-01-01), Boechmann
patent: 4759059 (1988-07-01), Mellon

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