Abstract: Systems, methods, and apparatus for generating a reference current. A reference current source can include a current generator circuit; a first resistance circuit that has a positive temperature dependence; and a second resistance circuit that has a negative temperature dependence. The first resistance circuit and the second resistance circuit can be connected in parallel to the current generator circuit.

Abstract: A communication system has a trunk extending from a network facility, such as a central office, with a plurality of distribution points positioned along the trunk. Each leg of the trunk defines a shared channel that permits peak data rates much greater than what would be achievable without channel sharing. As an example, the connections of each respective trunk leg may be bonded. Further, the same modulation format and crosstalk vectoring are used for each leg of the trunk. The crosstalk vectoring cancels both far-end crosstalk (FEXT) that couples between connections of a given trunk leg and crossover crosstalk that couples between one trunk leg and another. In addition, logic determines an amount of excess capacity available for each leg of the trunk and controls error correction based on the determined excess capacity.

Abstract: A wireless mesh access point (AP) determines a candidate set of Basic Service Set Identifiers (BSSIDs) or other unique identifiers by monitoring for detection of a set of wireless communications, each bearing a unique identifier. The AP selects a candidate unique identifier from the candidate set. The AP establishes a wireless communication link with a controller of a wireless mesh network associated with the candidate unique identifier. The AP transmits a request to the controller to join the wireless mesh network associated with the candidate unique identifier. The AP receives a response from the controller indicating either acceptance or rejection of the request. If the response indicates rejection, the AP rejects one or more unique identifiers in the candidate set in response to reason information included in the rejection.

Abstract: Systems and methods for wireless management access to a telecommunication device are provided. A portable device, such as a tablet, smartphone, etc., can be used to access a network device, such as a telecommunication device, by accessing a wireless access module of the telecommunication device using any desired wireless technology. When the portable device is in proximity to the telecommunication device the presence of the portable device may be detected, causing an attempted wireless communication between the portable device and the wireless access module. The portable device may provide various security information to the wireless access module that may be verified before access to the telecommunication device is granted. If the portable device is verified it may be authorized for wireless communications with the telecommunication device, including receiving an identifier for the telecommunication device.

Abstract: A coupling module can be used to communicate high speed signals between an optical transceiver and a processing module of an optical communication device, such as an optical line termination (OLT) or an optical network unit (ONU). The coupling module can adjust the DC offset voltage level of the signal output by the optical transceiver to the DC offset voltage level required by the processing module. In addition, the coupling module splits the output signal from the optical transceiver and passes the signal to both a high pass filter and a low pass filter that are connected in parallel. The outputs of the high pass filter and the low pass filter are then combined and provided to the processing module. The high pass filter and the low pass filter can be configured such that all frequencies of the signal from the optical transceiver are provided to the processing module.

Abstract: Systems and methods are disclosed that generally pertain to provisioning an optical network unit (ONU) by an optical line terminal (OLT) of a passive optical network (PON). An exemplary provisioning system includes a wireless reader incorporated into the ONU and a transponder unit attached to a fiber optic cable coupled to the ONU. The transponder unit includes a storage element in which is stored provisioning information, such a registration ID associated with the ONU. The wireless reader automatically obtains the provisioning information from the transponder when the fiber optic cable is coupled to the ONU and transmits the provisioning information to the OLT via the fiber optic cable as a part of a discovery procedure. The transmission of the provisioning information in this manner eliminates the need for a service technician to visit a customer premise and manually provide the provisioning information via a POTS port of the ONU.

Abstract: Methods, systems, and apparatus for overlaying a passive optical network on a legacy optical access network are disclosed. In one aspect a system includes a legacy optical access network in a copper loop plant. The legacy optical access network provides access to customer premises. The system also includes a gigabit passive optical network (GPON) that is overlaid on the legacy optical access network. A fiber is shared by the GPON and the legacy optical access network. The GPON can provide a plurality of channels on the shared fiber at wavelengths that are separate and independent of wavelengths of the legacy optical access network.

Abstract: Systems, and apparatus for adding reflection based pre-emphasis to a laser driver. In one aspect, a device includes a load (e.g. a laser) having a load impedance, a first end of a transmission line connected to the load, and a reflective impedance element connected to a second end of the transmission line. The reflective impedance element has a given impedance value that differs from the transmission line's characteristic impedance, and the characteristic impedance differs from the load impedance. This mismatch causes reflections between the reflective impedance element and the load. The reflections between the reflective impedance element and the load combine with an incident signal at the load to create a target signal having a target spectral shape.

Abstract: A communication system has a network access device (NAD) that is designed to deliver Plain Old Telephone Service (POTS) along with high-speed data to Customer Premises Equipment (CPE). The NAD is backpowered by the CPE across a subscriber line. When backpower is provided from the CPE, circuitry (referred to as a “POTS signaling element”) within the network access device converts POTS control signaling to digital data for transmission to the CPE. The band vacated by the POTS control signaling is used for the power signal on the subscriber line. In the absence of backpower, components of the network access device are bypassed, thereby providing POTS in the event of a power failure. The NAD receives advance warning of the backpowering so that it can disable the bypassing in order to prevent the power signal from leaking through the NAD to the network.

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; allocating, by the network element, a different transmission interval to each vectoring group from the multiple vectoring groups based on the transmission load of the vectoring group and transmission loads of other vectoring groups in the multiple vectoring groups; and transmitting, during each different transmission interval, at least a portion of the transmission load of the vectoring group that was allocated the different transmission interval.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for managing device firmware. In one aspect, a system includes a file server; a subtending device coupled to the file server, and a telecommunications node coupled to the subtending device. The subtending device can include one or more line cards that connect one or more telecommunications nodes to a network. The telecommunications node receives, from the subtending device, a group name and replaces a wildcard in a firmware filename to derive a first network path of firmware files. The telecommunications node installs the firmware files and subsequently receives an updated group name. The telecommunications node replaces the wildcard with the updated group name to derive an updated path, and obtains different firmware files from the updated path. The firmware installed on the telecommunications node is managed based on the first firmware and the different firmware.

Abstract: A correlation optical time domain reflectometer (OTDR) provides a correlation sequence that is continuously transmitted along a fiber for testing the fiber for anomalies. Such continuous transmission can result in beat noise that degrades the quality of the measured returns. In this regard, each sample is composed of backscatter returns from many points along the fiber that arrive at the OTDR at the same time. When a subset of these returns have frequency differences that appear in the passband of the OTDR receiver, the constructive and destructive interference of these returns at the OTDR receiver can cause significant low-frequency beat noise in the OTDR signal. An optical transmitter is configured to transmit the correlation sequence through the fiber using a wideband optical signal such that the beat noise is suppressed within the passband of the OTDR receiver, thereby improving the quality of the returns measured by the OTDR.

Abstract: In a circuit card chassis, a backplane system includes card guides that are slideable on rails to provide any selected spacing between adjacent circuit cards. A backplane connector assembly extends between each pair of slideable top and bottom card guides. Signal cables can be configured to connect any two backplane connector assemblies to each other.

Abstract: A wireless network switch device includes wired-network switch circuitry and wireless local-area network (WLAN) radio devices integrated together within a common housing. WLAN antennas that are distributed about the WLAN coverage area can be coupled to antenna ports on the device housing. Channels are assigned to the WLAN radio devices and corresponding antennas in a manner that promotes minimization of signal interference between adjacent WLAN radio devices in the housing as well between adjacent antennas.

Abstract: For each traffic flow through a wireless mesh network, the most upstream wireless access point through which that traffic flow is communicated is determined. An indication of the traffic flow through the most upstream wireless mesh access point is output in a report or otherwise provided. The reported traffic flows can be summed to provide total traffic flow indications for the wireless mesh network.

Abstract: Methods, systems, and apparatus for selecting frame loss measures are disclosed. In one aspect, a Synthetic Loss Measurement (SLM) report for a given interval for a network managed entity that includes at least two network nodes is received. A Loss Measurement Message (LMM) report for a given interval for the network managed entity is received. For the given interval and from the SLM and LMM reports, a reporting measurement for the network managed entity is selected based, at least in part, on a frame rate of data transmitted over the network managed entity during the given interval or an occurrence of a specified network event during the given interval. Frame loss information for the given interval for the network managed entity based on the selected reporting measurement is reported.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for implementing biased bonding. In one aspect, a method includes estimating an offered load. Data are transmitted over a first communications link of two or more different types of communications links while the estimated offered load is less than or equal to a specified amount. A determination is made that the estimated offered load has exceeded the specified amount. In response to the determination data are transmitted over both of the first communications link and a second communications link of the two or more different types of communications links in response to determining that the estimated offered load has exceeded the specified amount.

Abstract: Methods, systems, and apparatus for protecting electrical components are disclosed. In one aspect a system includes a first gas discharge tube connected to a first conductor of a first twisted wire pair; and a second gas discharge tube connected to a second conductor of the first twisted wire pair. The first gas discharge tube can also be connected to a third conductor of a second twisted wire pair, and the second gas discharge tube can be connected to a fourth conductor of the second twisted wire pair.

Abstract: An optical communication system comprises a network interface device (NID) having a media converter coupled to an optical fiber of a passive optical network (PON). The media converter converts optical signals from the PON into electrical signals for communication across at least one non-optical channel, such as a conductive or wireless connection, to customer premises equipment (CPE), such as a residential gateway or other customer premises (CP) device. Rather than implementing an optical media access control (optical MAC) layer in the NID, an optical MAC layer for handling PON protocols and management is implemented by the CPE, thereby effectively extending the customer end of the PON across at least one non-optical connection to the CPE. By implementing the optical MAC layer at the CPE, the complexity of the NID is reduced thereby lowering the cost of the NID.

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 in a point-to-multipoint architecture. Each drop connection is coupled to at least one switch that operates under the control of the controller for selectively isolating the drop connection from the controller, as well as the CP transceivers of other drop connections. In this regard, by controlling the states of the switches, the DP controller can control to which of the CP transceivers it is communicatively connected, and during operation the DP controller controls the switches such that it is communicatively connected only to the CP transceivers for which communication is desired or needed during a particular time interval.