Abstract: A combination of algorithms and circuits are used to combine POTS, high-speed bi-directional data, and back-powering onto the drop connection for fiber to the distribution point architectures. A telephone adapter device can be utilized to prevent damage from back-powering occurring at POTS telephones connected to the drop connection. In addition, circuits are used to prevent damage from back-powering occurring at POTS telephones directly connected to the drop connection. A circuit is used to provide more consistent power to the electronics at the distribution point even when the input back-power to the distribution point may fluctuate.

Abstract: A communications session call is established between first and second call devices. A SIP Reinvite command is sent to the second call device without any SDP media parameters to gain new and current media parameters. The second call device acknowledges the Reinvite command as corresponding to the first SDP offer with new and current media parameters. A third call device is sent a SIP Reinvite command as a second SDP offer using new and current media parameters. The third call device acknowledges the SIP Reinvite command as corresponding to the first SDP answer to the first SDP offer. The second call device acknowledges as a second SDP answer to the second SDP offer. The call with the first call device is terminated to change the destination of the call and maintaining any media stream between the second and third call devices.

Abstract: An optical communication module include a housing having a circuit element configured to provide an optical communication function, and a rotatable connector assembly coupled to the housing, the rotatable connector assembly configured to rotate between a first position and a second position, wherein when in the first position, the rotatable connector assembly allows the communication module to interface with a first form factor card cage and when in the second position, the rotatable connector assembly allows the communication module to interface with a second form factor card cage.

Abstract: In accordance with a non-limiting example, a connector mates to a circuit board at a connector interface. The connector often introduces an undesirable level of crosstalk between pairs. Traces are formed on the circuit board in a “compensation region” that also introduces crosstalk between pairs. The “compensation region” is created in a geometrically controlled fashion such that the crosstalk in the compensation region is of equal magnitude, but opposing phase to the crosstalk introduced by the connector. Thus, the overall crosstalk is minimized.

Abstract: A device is suggested comprising a first DSL system operating in a first frequency band, a second DSL system operating in a second frequency band and a filter unit connected to a line and to each of the first DSL system and the second DSL system.

Abstract: A system for adjusting core voltage of an integrated circuit to optimize power savings has a ring oscillator on the integrated circuit for providing a ring oscillator signal. The system also has compare logic on the integrated circuit configured to compare the ring oscillator signal with a clock signal from a clock external to the integrated circuit. The compare logic is configured to make a determination whether a frequency of the clock signal is within a predefined margin of a frequency of the ring oscillator and to adjust the core voltage of the integrated circuit based on the determination. Through such adjustments, the core voltage is lowered while ensuring that the core voltage does not reach a point that causes timing errors.

Abstract: In a system for identifying subscriber lines, an end of a subscriber line is coupled to and terminated by a transceiver of interest. The other end of the subscriber line is coupled to a speaker. The transceiver is then selectively activated and deactivated causing it to transmit its normal frequency spectrum in a predefined pattern. The frequency spectrum includes frequencies audible to humans. Thus, the speaker produces sound capable of being heard by a human, and the sound exhibits periods of noise followed by periods of silence. Indeed, the periods of noise and silence are in a pattern according to the activation/deactivation pattern of the transceiver. Thus, a user can identify the subscriber line that is coupled to the transceiver by identifying which of the lines is coupled to the speaker when the speaker emits noise and silence according to the predefined pattern.

Abstract: Embodiments of the present disclosure generally pertain to systems and methods for interfacing with a network access device (“NAD”). An NAD in accordance with an exemplary embodiment of the present disclosure comprises an interface extension extending from a housing of the NAD. The interface extension comprises a cable and an enclosure that is sealed by a removable cap. The cable extends from a port on the housing, and the enclosure is positioned on the cable a desired distance from the housing. The removable cap screws onto the enclosure to form a water-tight chamber within the enclosure. The interface extension further comprises an interface connector connected to an end of the cable, and the interface connector is positioned within the chamber when the removable cap is screwed onto the enclosure. When access to the NAD is desired, a technician removes (e.g. unscrews) the removable cap from the enclosure and connects the interface connector to a user interface device.

Abstract: Methods, systems, and apparatus for determining values of downstream power back-off parameters are disclosed. In one aspect, a method includes receiving cable loss data of a cable configured to deliver a digital subscriber line (DSL) signal; identifying a cable model that characterizes a cable loss value at a frequency over a length of the cable; and determining a set of downstream power back-off (DPBO) parameter values of the cable model based on a product of a pseudo-inverse of a frequency matrix including a plurality of different frequencies and a vector of the cable loss data that includes a plurality of cable loss values with respect to the plurality of different frequencies of the pseudo-inverse of the frequency matrix.

Abstract: Methods, systems, and apparatus for providing network addresses are disclosed. In one aspect, a network element device in a telecommunication network includes a chassis coupled with a passive Radio Frequency Identification (RFID) device and a network line module coupled to the chassis. The passive RFID device stores a network node identifier that is used to communicate with a second network element device communicatively coupled with the network element device. The network line module includes a RFID reader that is configured to obtain the network node identifier from the passive RFID device when the network line module is initialized.

Abstract: Phase-locked loop (PLL) circuits and methods of operation are disclosed. At frequencies that are closer to a center frequency, the phase noise characteristics contributed by a crystal oscillator in a first PLL sub-circuit dominate over the phase noise characteristics contributed by a second PLL sub-circuit, resulting in low close-in phase noise in the overall PLL circuit output signal, while at frequencies farther from the center frequency, the phase noise characteristics contributed by the second PLL sub-circuit dominate over the phase noise characteristics contributed by the crystal oscillator in the first PLL sub-circuit, resulting in low phase noise in the overall PLL circuit output signal at those frequencies.

Abstract: A communication system comprises a passive optical network (PON) having an optical line terminal (OLT) coupled to a plurality of optical network terminals (ONTs) through a power splitter. Each ONT is coupled to the power splitter via a subscriber line. A switch is coupled to each subscriber line, and all of the switches are coupled to a control element. A power element is configured to receive optical signals communicated by the PON and to convert the optical signals into electrical power for use by the control element. The OLT is configured to detect a rogue ONT and to communicate with the control element for opening the switch that is coupled to the subscriber line of the rogue ONT, thereby optically isolating the rogue ONT from the rest of the PON.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for data processing in a digital subscriber line environment are provided. In one aspect a method includes (i) determining a deterioration of a connection between a centralized unit and a decentralized unit during an initialization of the connection; and (ii) disabling the connection based on the deterioration.

Abstract: A system for scaling vectored DSLAM deployments has a DSLAM interfaced with a cross-connect apparatus. The DSLAM receives POTS signals from at least one bridge connection assembly. When a DSLAM is added at the cross-connect facility, at least one connector of the bridge connection assembly is disconnected from an existing DSLAM and is interfaced with the newly-added DSLAM. By moving the connector to the newly-added DSLAM, a batch of downstream distribution pairs (which are preferably bound by a single distribution cable) are effectively moved from the existing DSLAM to the new DSLAM without having to reconfigure the jumpers of the cross-connect apparatus. Accordingly, it is possible to scale the cross-connect facility to any number of vectored DSLAMs while limiting vector group sizes, thereby reducing the complexity of vectoring operations, without having to perform complex reconfigurations of the cross-connect apparatus.

Abstract: In a distributed switching environment, a plurality of switches are clustered together to form a stack, and it is generally desirable for forwarding tables, such as MAC tables, to be synchronized so that their mappings are consistent. When a switch receives a packet having a source address (e.g., MAC address) that is unknown, the switch is configured to disseminate the source address to the other switches of the stack. Rather than using software protocols to disseminate the source address, the switch instead transmits a multicast packet that (1) includes the unknown source address and (2) spoofs the other switches into believing that the packet was received on the same port from which the unknown source address was received on ingress to the stack. Thus, the other switches learn the unknown source address in hardware without having to rely on software for updating their forwarding tables.

Abstract: The present disclosure generally pertains to optical communication apparatuses having field-tunable power characteristics. In one exemplary embodiment, an optical communication apparatus has an optical transmitter. The optical transmitter is coupled to logic that receives a user input indicative of a desired transmit mode for the transmitter, and the logic then dynamically tunes the transmitter's output power according to the selected transmit mode. In addition, the optical communication apparatus may have an optical receiver for receiving optical signals. The sensitivity of the receiver is controlled by a bias voltage that is applied to the receiver by the logic. The logic is configured to receive a user input indicative of a desired receive mode and then to tune the receiver's sensitivity via the bias voltage according to the selected receive mode.

Abstract: A controller at a distribution point (DP) of a communication system is coupled to a plurality of customer premises (CP) transceivers via drop connections. The controller is configured to schedule upstream and downstream data transmissions across the drop connections such that they do not overlap from one drop connection to another thereby avoiding the effects of crosstalk. A flexible frame structure is used to permit dynamic scheduling changes. Overhead for the flexible frame structure is permitted to overlap on the drop connections, and a reduced bit loading is used to communicate the overhead relative to the bit loading used for data transmissions.

Abstract: A system for handling address resolution protocol (ARP) messages has a plurality of communication modules for communicating via a network. Each such communication module has a separate link layer address (e.g., MAC address). Control logic in communication with each of the modules serves as an ARP proxy for the modules. Rather than using its own link layer address in the overhead of the ARP messages, the control logic uses the link layer addresses of the communication modules, thereby causing the network to learn these link layer addresses during ARP processing. Therefore, once ARP messaging between a communication module and a remote network device has been performed, the network has established a data path between the communication module and the remote network device, thereby helping to prevent or reduce message flooding when the two devices begin to communicate.

Abstract: The present disclosure pertains to systems and methods for Ethernet-based management of optical networks using ONT management interface (OMCI). In one exemplary embodiment, an Ethernet-based protocol, such as Active Ethernet, is used to implement an ONT management interface (OMCI) between an optical line terminal (OLT) and a plurality of ONTs of a MON. Further, virtual local area networks (VLANs) are used to separate the traffic carried by the MON. Various techniques are described that permit ONT registration and creation of VLANs for the MON without requiring the use of gigabit PON (GPON) constructs, such as traffic containers (TCONTs) and dedicated GPON encapsulation method (GEM) ports.

Abstract: A system for scaling vectored DSLAM deployments has a DSLAM interfaced with a cross-connect apparatus. The DSLAM receives POTS signals from at least one bridge connection assembly. When a DSLAM is added at the cross-connect facility, at least one connector of the bridge connection assembly is disconnected from an existing DSLAM and is interfaced with the newly-added DSLAM. By moving the connector to the newly-added DSLAM, a batch of downstream distribution pairs (which are preferably bound by a single distribution cable) are effectively moved from the existing DSLAM to the new DSLAM without having to reconfigure the jumpers of the cross-connect apparatus. Accordingly, it is possible to scale the cross-connect facility to any number of vectored DSLAMs while limiting vector group sizes, thereby reducing the complexity of vectoring operations, without having to perform complex reconfigurations of the cross-connect apparatus.