Billing interface circuit

Details Billing interface circuit Billing interface circuit

1979-10-03

1981-03-10

Robinson, Thomas A.

179 27FG, 179 7R, H04M 1100, H04M 1510, H04M 1534

Patent

active

042556210

ABSTRACT:
A billing interface circuit for controlling the billing of a station of a private branch exchange via a telephone central office. This circuit automatically connects an intercept recorder to the operator requesting time and charges while providing ring back tone to the station. Therefore, the attendant at the private branch exchange is relieved of the task of manually interfacing between the station and the telephone central office to request time and charges information for billing.

REFERENCES:
patent: 3536839 (1970-10-01), Prins
patent: 3721769 (1973-03-01), Krock et al.
patent: 3920912 (1975-11-01), Anderson et al.

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