Method and apparatus for controlling a subscriber phone system i

Details Method and apparatus for controlling a subscriber phone system i Method and apparatus for controlling a subscriber phone system i

1981-07-31

1983-06-07

Cardillo, Jr., Raymond F.

179 603, 179 607, 179 616, H04M 165

Patent

active

043872727

ABSTRACT:
A method and apparatus is provided for controlling a subscriber phone system including at least one automatic phone answering machine. When a calling party dials the phone number of a subscriber he wants to call, the apparatus will close the direct current loop, in response to which the calling party receives a ring-back signal. If he does not send a pre-established code after having received the ring-back signal, and after a predetermined period of time has elapsed, the phone line will be automatically connected to an automatic phone-answering machine. But if he dials a pre-established code after the closing of the direct current loop, the code will be displayed on a display device and at the same time an acoustic signal source will be activated, warning the called party that he is receiving a call from somebody who knows the pre-established code. Looking at the display device, the called party is able to know the code and may or may not want to attend the call. If he does attend the call, the automatic phone-answering machine will not be connected to the phone line; instead, the phone set of the subscriber will be, allowing him to answer the call in a normal way. If he does not attend the call or is not able to do so, for example because he is absent from the place, then, after a certain period of time has elapsed, the automatic phone-answering machine will be connected to the phone line.

REFERENCES:
patent: 3784721 (1974-01-01), Kilby
patent: 3793487 (1974-02-01), Kilby

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