Telephone for connection to a public telephone network

Details Telephone for connection to a public telephone network Telephone for connection to a public telephone network

2005-08-09

2005-08-09

Tran, Sinh (Department: 2644)

Telephonic communications

Substation or terminal circuitry

Conversion of signal form

C379S395000, C379S395010

Reexamination Certificate

active

06928159

ABSTRACT:
In the case of the inventive telephone, telephone operating signals (bell signal, charge-unit signals and caller identifiers) and audio signals are processed together by an integrated circuit. This requires signal level matching to be performed for the individual signals. Since the telephone signals are processed together by a chip, preferably by a digital signal processor, the hitherto required complexity for discrete components can be reduced.

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