Electronic key telephone set with function operation test functi

Details Electronic key telephone set with function operation test functi Electronic key telephone set with function operation test functi

1989-09-21

1991-02-19

Schreyer, Stafford D.

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

Testing of subscriber loop or terminal

579156, H04M 124

Patent

active

049950703

ABSTRACT:
This invention is an electronic key telephone set including light-emitting elements for state indication, an acoustic converting element for converting a voice signal into an acoustic wave, a display unit for displaying characters and the like, operations keys, including pushbuttons, for performing an input operation, and a control unit having an operation check test function for checking functions of the telephone set including telephone set components such as the light-emitting elements, the display unit, and the acoustic converting element, for waiting for a key input after initialization is executed, if predetermined specific keys of the operation keys are operated within a predetermined time, executing the operation check test function, and if the specific keys are not operated within the predetermined time, activating a function as a normal telephone set. A button operation required for executing the operation test for functions of the telephone set is accepted for a predetermined limit time such that the button operation need only be performed within the limit time after the telephone set is connected to a switching system. The operation for executing the function operation test can be easily performed.

REFERENCES:
patent: 4517409 (1985-05-01), Nagasaki

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