Abstract: Methods, systems, and apparatus for crosstalk avoidance in a telecommunications network are disclosed. In one aspect a method includes determining, by a network element and for each vectoring group from multiple vectoring groups, a transmission load of the vectoring group based on transmission loads of links within the vectoring group; identifying, by the network element, a resource allocation interval (RAI) that is shared by the multiple vectoring groups; determining, based on the transmission load of each vectoring group and by the network element, a first portion of the RAI that will be a normal operation interval (NOI) and a second portion of the RAI that will be a discontinuous operation interval (DOI); transmitting, by the network element, data over all of the multiple vectoring groups during at least a portion of the NOI; and transmitting, by the network element, data over fewer than all of the vectoring groups during the entire DOI.

Abstract: A combination of algorithms and circuits can control the connectivity of a drop connection to either a telephone service or a high-speed data service at a distribution point. The algorithms and circuits can operate in the absence of a conventional power supply at the distribution point. The circuits can connect the drop connection to the high-speed data service in response to the receipt of an activation signal sent by equipment at the customer premises. After the connection to the high-speed data service is complete, the customer premises equipment can be used to apply back power to the components of the distribution point. If the customer premises equipment stops providing back power to the components of the distribution point, the circuits can connect the drop connection to the telephone service.

Abstract: A server responds to a DHCP request for an IP address by setting a subnet in accordance with whether the client's MAC address is recognized as previously having been authenticated or otherwise associated with a policy. If the client has not been authenticated, the server provides a captive portal to enforce authentication. A routing device positioned in the network between clients and the server controls access to network resources by routing communications from clients in accordance with subnet addressing, where each subnet is associated with a policy.

Abstract: A convection-cooled electronic system includes an electronic device and a stand. The electronic device has air intake openings in a lower housing portion and air exhaust openings in an upper housing portion. The stand has air intake openings. The stand has a periphery, a flat base, and a slot extending across the widest portion of the stand. The slot has a shape configured to receive the lower portion of the device housing. Heat emitted by electronic components within the device housing creates airflow by convection, which causes air to be drawn into the stand through the stand air intake openings and communicated into the device air intake openings. The air is heated as it passes through the device housing, and the heated air exits the device housing through the air exhaust openings.

Abstract: A rogue access point in a wireless local-area network can be disabled by an authorized access point wirelessly transmitting a layer-2 broadcast packet. If a rogue access point receives this broadcast packet, it will forward a copy to the switch to which it is connected. The switch then determines whether the port on which the copy of the broadcast packet is received is associated an authorized access point port. If the switch determines the port is not an authorized access point port, the switch shuts down the port.

Abstract: Power dissipation within a network service unit, such as digital-subscriber-line access multiplexer (DSLAM), is treated as a resource that is to be shared among subscribers. In this regard, the total amount of available power dissipation is quantified, and the framing for the data streams communicated across the subscriber lines are controlled to ensure that specified power dissipation limits are not exceeded, accounting for one or more factors, such as traffic load, service level agreement (SLA) specifications, available power, and temperature.

Abstract: An Internet protocol (IP) phone is installed in a private branch exchange (PBX) system without a user having to manually correlate the phone's media access control (MAC) address with the phone's extension identifier. In this regard, the PBX is configured to automatically learn the phone's MAC address and correlate such address with an extension identifier entered by the user. Thus, the phone can be installed for use with the PBX system with reduced complexity and burdens for the user.

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: 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: 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 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: 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: 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 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.