Telephonic communications – With usage measurement – Call charge metering or monitoring
Patent
1989-05-31
1990-05-15
Schreyer, Stafford D.
Telephonic communications
With usage measurement
Call charge metering or monitoring
379157, 379140, 379387, 379441, H04M 1528, H04M 1534
Patent
active
049264656
ABSTRACT:
There is disclosed a method capable of indicating a communicating duration on a displaying means (LCD) of a key-phone upon a communication via the public telephone office line in a key-phone system. The method includes the steps of: a first process for driving a communicating duration starting timer and informing that communication is started; second process for initializing a buffer storing a communicating duration and driving the communicating duration increasing timer; third proces for driving said communicating duration increasing timer and then checking if it is in a state of a public telephone office line reserving, and terminating in a state of accumuating the communicating duration to a buffer; fourth process for producing present communicating duration data and transmitting the data to a key-phone; and fifth process for increasing a count value of communicating duration storing buffer, driving the communication increasing timer, and advancing to said third process.
REFERENCES:
patent: 4656657 (1987-04-01), Hunsicker
patent: 4813065 (1989-03-01), Segala
Samsung Electronics Co,. Ltd.
Schreyer Stafford D.
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