Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection
Reexamination Certificate
2007-05-29
2007-05-29
Tieu, Binh (Department: 2643)
Telephonic communications
Supervisory or control line signaling
Using line or loop condition detection
C379S024000, C379S182000, C379S406010
Reexamination Certificate
active
09395011
ABSTRACT:
A description is given of a communication set for connection to a communication line such as a telephone line, which communication set includes means for detecting set functions such as ringing signal detection, and a rectifier circuit which is connected to a common output which is coupled to a scanning device included in the set function detection means, which scanning device detects the line conditions. A large number of line conditions may be detected with a minimum of components required, among which an analog/digital converter for which only a single input pin on a chip is necessary.
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Sijbers Peter J. M.
Thus Franciscus J. M.
Van Leeuwen Laurens C.
Philips Electronics North America Corp.
Tieu Binh
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