Scrambler bypass system
AssigneeLucent Technologies Inc.
InventorScott L. Forgues
Life of this patent
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Abstract
A cordless phone configured to operate in both a scrambling mode and non-scrambling mode comprises a base station and a cordless handset terminal. Both the base station and the cordless handset terminal include voice scrambler circuits for scrambling and descrambling audio signals. Each of these voice scrambler circuits includes a bypass switch that when activated is adapted to couple audio signals from the input terminal of each scrambler circuit to the output terminal of each scrambler circuit via a bypass route. When the cordless phone operates in its non-scrambling mode, the audio signals are not affected by the internal circuitry of the voice scrambler circuits, leading to a substantially improved voice quality.
Claims15
A cordless phone comprising:
- a base station configured to receive audio signals from a phone line and to transmit audio signals to said phone line said base station further including:
- a transmitter section comprising a first voice scrambler circuit coupled to said phone line so as to scramble audio signals received from said phone line;
- a receiver section comprising a second voice scrambler circuit coupled to said phone line so as to descramble audio signals intended to be transmitted to said phone line;
- a handset terminal configured to receive audio signals from said base station and to transmit audio signals to said base station further including;
- a transmitter section comprising a third voice scrambler circuit coupled to an audio microphone so as to scramble audio signals intended to be transmitted to said base station;
- a receiver section comprising a fourth voice scrambler circuit coupled to an audio speaker so as to descramble audio signals received from said base station;
- and
- wherein said voice scrambler circuits of said base station are activated upon receiving a scrambler mode indication signal from said handset terminal and said voice scrambler circuits of said handset terminal are activated upon receiving a predetermined scrambling mode indication signal from said base station, said voice scrambler circuits include a bypass switch that when activated is adapted to couple said audio signals from the input terminal of each scrambler circuit to the output terminal of each scrambler circuit.
Dependencies are inferred from the claim text.