Abstract: An apparatus adapted to operate a pluggable optical transceiver in a plurality of modulation schemes includes core circuitry adapted to interface with a host device, wherein the host device is adapted to support the pluggable optical transceiver; direct detection modulation circuitry communicatively coupled to the core circuitry; coherent modulation circuitry communicatively coupled to the core circuitry; and selection circuitry adapted to operate one of the direct detection modulation circuitry and the coherent modulation circuitry based on a selection depending on an application of the pluggable optical transceiver.

Abstract: An apparatus adapted to operate a pluggable optical transceiver in a plurality of modulation schemes includes core circuitry adapted to interface with a host device, wherein the host device is adapted to support the pluggable optical transceiver; direct detection modulation circuitry communicatively coupled to the core circuitry; coherent modulation circuitry communicatively coupled to the core circuitry; and selection circuitry adapted to operate one of the direct detection modulation circuitry and the coherent modulation circuitry based on a selection depending on an application of the pluggable optical transceiver.

Abstract: A method of transmitting bidirectional telephony communication signals on a single optical fiber. The bidirectional signals are transmitted in one direction as NRZ coded signals at a first clocking pulse rate, and in the other direction as Manchester coded signals at a second clocking pulse rate which is a multiple (preferably three times (3×)) of the first clocking pulse rate.

Abstract: A single fiber passive optical network (PON) wavelength division multiplex (WDM) overlay includes a central office, a fiber optic network, and a plurality of optical network termination (ONT) units. The central office has a baseline optical link that receives a baseline communication signal and converts the baseline communication signal into a downstream baseline optical signal within a first optical bandwidth, and has an additional optical link that receives a second type of communication signal and converts the second type of communication signal into a second downstream optical signal within a second optical bandwidth. The downstream baseline optical signal generated by the baseline optical link is combined with the second optical signal generated by the additional optical link to generate a broadband optical signal. The fiber optic network is coupled to the central office and receives the broadband optical signal on at least one optic fiber.

Abstract: A method and apparatus for low cost upgrading on demand of an optical fiber communication system without installing additional optical fiber and minimal installation of optical circuitry at destination and distribution terminals. The upgraded systems comprise an optical data loop of a plurality of destination terminals and a single intermediate terminal.

Abstract: A communication system for providing high speed data services to a subscriber using optical fibers comprises a first optical interface unit (OIU) and a second OIU. The first OIU transmits optical representations of signals from an electrical communication path to the second OIU, which forwards electrical representations of those signals to a subscriber. The second OIU transmits optical representations of electrical signals from the subscriber to the first OIU, which forwards those signals to the electrical communication path. The second OIU further forwards electrical representations of another received optical signal to the subscriber. In one embodiment, the first OIU is located at a network node element such as a HDT, for example. In another embodiment, the second OIU is located at an optical node device such as an ONU, for example.

Abstract: A method of transmitting TV signals and bidirectional telephone communication signals on a single optical fiber, existing telephone twisted pair infrastructure, and existing coaxial cable infrastructure. In addition to allowing the downstream transmission of television channels as well as bidirectional telephone communication, the single optical fibers also provides for the upstream travel of television related signals while requiring minimal changes of the existing infrastructure.

Abstract: A method of transmitting TV signals and bidirectional telephone communication signals on a single optical fiber, existing telephone twisted pair infrastructure, and existing coaxial cable infrastructure. In addition to allowing the downstream transmission of television channels as well as bidirectional telephone communication, the single optical fibers also provides for the upstream travel of television related signals while requiring minimal changes of the existing infrastructure.

Abstract: Optical interface units are provided for transmitting data and video signals in a deep fiber network. The optical interface units may include a first type which is situated in a central location, such as at a host digital terminal in a central office location, and a second type which is situated near a subscriber location, such as at an optical network unit. The first type of optical interface unit combines downstream video signals at a first wavelength with downstream data signals at a second wavelength and also receives upstream data signals at the second wavelength. The second type of optical interface unit receives the transmissions from the first type of optical interface unit at the first wavelength and transmits the upstream data signals at the second wavelength. Various embodiments of the optical interface units are provided for extending the functionality of the network to provide high speed data and video on demand services.

Abstract: A method of transmitting and rapidly recovering a burst of data without first having to establish a timing or phase lock. The signals are transmitted as modified Manchester coded signals having pulse transitions at a clocking pulse rate which is a multiple of the clocking pulse rate at which the signals are originally generated, and wherein the MOOSE coded signal is modified by ON-OFF keying.

Abstract: A method and apparatus for low cost upgrading on demand of an optical fiber communication system without installing additional optical fiber and minimal installation of optical circuitry at destination and distribution terminals. The upgraded systems comprise an optical data loop of a plurality of destination terminals and a single intermediate terminal.

Abstract: Optical interface units are provided for transmitting data and video signals in a deep fiber network. The optical interface units may include a first type which is situated in a central location, such as at a host digital terminal in a central office location, and a second type which is situated near a subscriber location, such as at an optical network unit. The first type of optical interface unit combines downstream video signals at a first wavelength with downstream data signals at a second wavelength and also receives upstream data signals at the second wavelength. The second type of optical interface unit receives the transmissions from the first type of optical interface unit at the first wavelength and transmits the upstream data signals at the second wavelength. Various embodiments of the optical interface units are provided for extending the functionality of the network to provide high speed data and video on demand services.

Abstract: A communication system for providing high speed data services to a subscriber using optical fibers comprises a first optical interface unit (OIU) and a second OIU. The first OIU transmits optical representations of signals from an electrical communication path to the second OIU, which forwards electrical representations of those signals to a subscriber. The second OIU transmits optical representations of electrical signals from the subscriber to the first OIU, which forwards those signals to the electrical communication path. The second OIU further forwards electrical representations of another received optical signal to the subscriber. In one embodiment, the first OIU is located at a network node element such as a HDT, for example. In another embodiment, the second OIU is located at an optical node device such as an ONU, for example.

Abstract: A method of transmitting bidirectional telephony communication signals on a single optical fiber. The bidirectional signals are transmitted in one direction as NRZ coded signals at a first clocking pulse rate, and in the other direction as modified a hybrid form of ON-OFF keying coded signals having pulse transitions at a second clocking pulse rate which is a multiple (preferably eight times (8×)) of the first clocking pulse rate, wherein the modified Manchester coded signal is modified by ON-OFF keying.

Abstract: Apparatus and methods for maintaining balanced communication channels evenly even with heavy increases in service demands are disclosed. The apparatus uses an arrangement of jumpers and unique connection panes which allow rapid changes in the distribution of similar circuits to achieve balanced loads.

Abstract: A method of transmitting RF return signals from an end user to an RF source is provided. The method comprises the steps of converting RF return signals into RF return data packets having control information, combining the RF return data packets with data packets from other sources to obtain a first collection of combined data packets, and multiplexing the first collection of combined data packets with digital telephony data packets containing samples of POTS signals. The method further comprises the steps of transporting the first collection of combined data packets and digital telephony data packets over an optical fiber, receiving and demultiplexing the first collection of combined data packets and digital telephony data packets, and combining the RF return data packets with data packets from other sources to obtain a second collection of combined data packets.

Abstract: A communication system for providing high speed data services to a subscriber using optical fibers comprises a first optical interface unit (OIU) and a second OIU. The first OIU transmits optical representations of signals from an electrical communication path to the second OIU, which forwards electrical representations of those signals to a subscriber. The second OIU transmits optical representations of electrical signals from the subscriber to the first OIU, which forwards those signals to the electrical communication path. The second OIU further forwards electrical representations of another received optical signal to the subscriber.

Abstract: A single fiber passive optical network (PON) wavelength division multiplex (WDM) overlay includes a central office, a fiber optic network, and a plurality of optical network termination (ONT) units. The central office has a baseline optical link that receives a baseline communication signal and converts the baseline communication signal into a downstream baseline optical signal within a first optical bandwidth, and has an additional optical link that receives a second type of communication signal and converts the second type of communication signal into a second downstream optical signal within a second optical bandwidth. The downstream baseline optical signal generated by the baseline optical link is combined with the second optical signal generated by the additional optical link to generate a broadband optical signal. The fiber optic network is coupled to the central office and receives the broadband optical signal on at least one optic fiber.

Abstract: A communication system for transmitting video signals to a subscriber using optical fibers, for providing bi-directional telephone services for a subscriber using optical fibers, and for providing high-speed data services to a subscriber via a cable modem using optical fibers is provided. The communication system comprises a first optical fiber for transporting video programming at a first wavelength from a video-programming source to a network node. The system further comprises a second optical fiber for transporting video programming at a second wavelength from the network node to an optical node device and for transporting bi-directional telephone signals between the optical node device and the network node at a third wavelength in a downstream direction and a fourth wavelength in an upstream direction.

Abstract: An apparatus for supporting a plurality of densely arranged electrically shielded communication panels includes a rack that supports at least two panels. The panels are supported adjacent to each other by the rack, and each panel includes at least two sides with a printed circuit on one side and a conductive sheet on the other side. In addition, the conductive sheet on each of the panels is coupled to an electrical connection point on the rack when the panel is placed in the rack. The two panels are placed in the rack such that the printed circuit of one of the panels is electrically shielded by the conductive sheet on another, closely aligned other one of the panels.