Method for monitoring telephone status changes

Details Method for monitoring telephone status changes Method for monitoring telephone status changes

1988-09-19

1989-07-11

Schreyer, Stafford D.

Telephonic communications

Telephone line or system combined with diverse electrical...

Having transmission of a digital message signal over a...

379112, 379208, H04M 1100, H04M 342

Patent

active

048478938

ABSTRACT:
A method is disclosed for controlling the monitoring of telephone status changes by an associated processor. A status change inquiry message is transmitted from the associated processor to the telephone and is utilized to set an interrupt mode within the telephone. The status change inquiry message may also include a timer setting value which is utilized, in a preferred embodiment of the present invention, to determine a maximum duration for the interrupt mode. In response to a change in telephone status, or the termination of the timed interrupt mode, a single phone status message is sent to the associated processor and the interrupt mode is terminated. In this manner, a change in phone status may be determined by the associated processor without the necessity of continuously polling the telephone. Further, any transmission of a phone status change terminates the interrupt mode and prohibits the telephone from continuously interrupting the associated processor with status change messages.

REFERENCES:
patent: 3609245 (1971-09-01), Richter et al.

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