Abstract: The device provides for a detector and switch which allows a signal to be transmitted from the subscriber to the head-end provider, but, in all other circumstances, the device does not allow other signals or ingress to enter the CATV system from the subscriber's house.

Abstract: A cable television system having combiners, splitters, amplifiers, directional couplers or other devices wherein the entire system is controlled electronically.

Abstract: An amplifier systems for a cable television (CATV) system to increase the ability of a sub-band to transmit information using switchable bands.

Abstract: An asymmetrical coupler including first, second, and third diplex filters and first and second directional couplers is described. The first diplex filter is connected with a main input. The first directional coupler is connected with the first diplex filter. The first directional coupler has a first tap with a first value. The second directional coupler is connected with the first diplex filter. The second directional coupler has a second tap with a second value. The second diplex filter is connected with a main output. The second diplex filter is connected with the first and second directional couplers. The third diplex filter is connected with a main tap. The third diplex filter is connected with the first and second directional couplers.

Abstract: An amplifier circuit for amplifying a downstream signal carrying voice over internet protocol data is disclosed. The amplifier circuit includes an input which receives the downstream signal, an amplifier, an output, and a bypass circuit. The amplifier receives the downstream signal from the input and amplifies the downstream signal. The amplifier then outputs an amplified signal carrying voice over internet protocol data. The output receives the amplified signal from the amplifier and is connected with an external device capable of receiving and converting voice over internet protocol data to sound. The bypass circuit connects the input directly to the output. Upon activation of the bypass circuit, the downstream signal is transmitted directly from the input to the output and bypasses the amplifier.