Abstract: In a transmitter, first and second sets of discrete multitone (DMT) sub-carrier signals or tones are identified. First and second bit groups of a payload data frame corresponding to the first and second sets of tones are selected. The first bit group is then trellis encoded. The second bit group is not trellis encoded. The first trellis coded tone group and the second bit group are then constellation mapped to produce a DMT symbol for transmission. A receiver may use an estimate of signal-to-noise ratio (SNR) of each tone to determine whether to select the tone for inclusion in the first or second set of tones. The receiver may provide the transmitter with information indicating whether a tone is included the first or second set of tones.

Abstract: A software upgrade in a data communication network may be provided by a first node. The first node may transfer a software unit to other nodes in the network. The first node may also monitor for receipt of a notification indicating completion of storage of the software unit by a node. The first node may further transmit a reboot command to the other nodes. The first node transmits the reboot command in response to receipt of the completion notification from each of the other nodes. The first node does not transmit the reboot command to any of the other nodes until the first node has received a completion notification from each of the other nodes.

Abstract: A system and method is provided for prioritizing packets at an Ethernet interface of a network device based on the destination MAC address in the packets. The Ethernet interface has a MAC table that lists the MAC addresses that can be accepted by the Ethernet interface. The MAC table can include one or more MAC addresses associated with low priority packets and one or more MAC addresses associated with high priority packets. When conditions at the network device exceed a threshold, the MAC table can be updated to disable or delete the MAC addresses associated with the low priority packets. By disabling the MAC addresses for low priority packets, only the MAC addresses associated with high priority packets remain in the MAC table, thereby enabling only high priority packets to be recognized and passed by the Ethernet interface to the CPU.

Abstract: An aggregation module receives a data packet. A bonding engine of the aggregation module breaks the data packet into fragments, and each fragment is part of a bonding group that is assigned a sequence identifier that allows the data packet to be reconstructed from the fragments. Each fragment is provided to one of a plurality of transmitters to be transmitted over a data link. When a noise event occurs on one of the data links, the fragments stored at the transmitter associated with that data link are transferred to another transmitter within the same bonding group for transmission over a different data link.

Abstract: A wireless network device only installs configuration information that is wirelessly received from a provisioning device if the wireless network device successfully authenticates a security token it receives from the provisioning device. The provisioning device can obtain the security token by scanning a label associated with the wireless network device or by other methods.

Abstract: Optical telecommunications devices, systems, and methods. In some implementations, an optical networking unit (ONU) includes a multi-rate receiver having an operating bandwidth that is selected operationally based on physical layer characteristics of received signals and information received from a MAC. The ONU can also include an upstream laser circuit having an output impedance that differs from a characteristic impedance of a system in which the laser circuit is implemented. The ONU can also include a decision feedback equalizer (DFE) having at least one tap weight that is fixed to facilitate convergence of the DFE when signals received by the DFE would otherwise fail to meet characteristics required for DFE convergence.

Abstract: Methods, systems, and apparatus for providing airtime fairness in a telecommunications network are disclosed. In one aspect a method includes determining, by an access point, respective transmission rates of multiple stations configured to wirelessly communicate with the access point; determining, by the access point and for each of the multiple stations, a weight of the station that is proportional to the respective transmission rate of the station; and transmitting, wirelessly by the access point and to each of the multiple stations, one or more packets to the station during an airtime allocation to the station, wherein the amount of one or more packets transmitted during the airtime allocation corresponds to the weight of the station and a size of queued packets for the station.

Abstract: A network element is provided comprising at least one switch, which is configurable to connect a subscriber line to a first service line or to a second service line, wherein the connection of the subscriber line to the first service line or to the second service line is configured via a signal conveyed across the second service line. Also, a system is suggested comprising two or more switches, wherein each switch is configurable to connect a subscriber line to a first service line or to a second service line, a control circuitry for controlling the two or more switches, an MSAN comprising two or more second service lines, wherein a dedicated service line of an MSAN is used for controlling the control circuitry. Further, methods for operating the network element or the system are suggested.

Abstract: Methods, systems, and apparatus for automatically injecting symbol errors into a data stream prior to transmitting the data stream for timing recovery robustness are disclosed. In one aspect, a first telecommunications device determines that a data transition rate of a data stream exceeds a pre-specified rate. In response to the determination that the data transition rate exceeds the pre-specified rate, the first telecommunications device injects symbol errors into the data stream prior to transmitting the data stream to a second telecommunications device. The pre-specified rate is based on at least a nominal passband of the second telecommunications device.

Abstract: A network switch allocates large-scale memory units as data packets are received in order to implement per-queue, circular egress buffers. Each large-scale memory unit is larger than the maximum packet length of the received packets and is capable of storing a plurality of data packets, thereby reducing the number of memory allocation events that are required to process a given number of data packets. Efficient techniques for writing to and reading from the large-scale egress memory units have been developed and may be used to reduce processing delays. Such techniques are compatible with relatively inexpensive memory devices, such as dynamic random access memory (DRAM), that may be separate from the circuitry used to process the data packets. The described architectures are easily scalable so that that a large number of ports (e.g., thousands) may be implemented at a relatively low cost and complexity without introducing significant processing delays.

Abstract: Assemblies include a micronode having an optical connector, a coaxial connector port and a housing that includes a plurality of mounting bores. The assembly further includes a filter having a housing that underlies the micronode housing, the filter housing including a plurality of mounting bores, the mounting bores of the filter housing aligning with the mounting bores of the micronode housing. The filter further includes a first optical connector configured to receive an optical drop cable, a second optical connector configured to receive an optical cable and an optical pigtail cord that is connected to the optical connector of the micronode.

Abstract: Systems and methods are provided for an optical network unit (ONU) to automatically set its output power level for messages to be transmitted on a passive optical network. The ONU can autonomously determine the appropriate power level based on information provided to the ONU by an optical line terminal (OLT) and characterization by the ONU of optical signals it receives from the fiber. Specifically, the OLT can provide the ONU with control data indicative of the power level used by the OLT to transmit the message and the desired power level of the OLT for messages from the ONU. The ONU can measure the power level of at least one message received from the OLT and determine the path loss based on the measured power and the control data. The ONU can then automatically determine a suitable power level for its response message such that unacceptable levels of crosstalk between channels are avoided without having to perform an iterative power-leveling process that otherwise may introduce significant delays.

Abstract: A system for broadband communication over a local wireless communication channel includes a router configured to wirelessly access a wireless communication network, and a wireless broadband access device having wireless access to a wireless broadband communication network, the wireless broadband access device configured to wirelessly access the wireless communication network and configured to provide a bi-directional wireless communication channel to the router using the wireless communication network.

Abstract: Methods, systems, and apparatus for selective MAC address learning are disclosed. In one aspect, multiple different packets are received by a telecommunications device. The multiple different packets include different source MAC addresses. For each of the multiple different packets, a distribution type is determined. The distribution type is one of a one-to-one distribution type or a one-to-many distribution type. Based on the determined distribution type of the particular packet, a forwarding table of the telecommunications device is selectively updated. When the particular packet has the one-to-many distribution type, a source MAC address that is included in the particular packet is not stored in the forwarding table. When the particular packet has the one-to-one distribution type, the source MAC address that is included in the particular packet is stored in the forwarding table.

Abstract: Methods, systems, devices, and computer readable medium for processing data in a digital subscriber line environment are disclosed. In one aspect methods include establishing a first data channel in a first system utilizing a first frequency band. Methods also include conveying, for a second system that establishes a second data channel over a second frequency band, handshake information using the first system.

Abstract: A memory system has a plurality of memory stages in which each stage stores a respective portion of a data table. A request for reading an entry of the table is processed serially by the memory stages, and each stage narrows the range of table entries possibly storing the requested data. Based on the results of the previous stages, the final stage is able to quickly determine whether the requested data is stored in the data table and, if so, to retrieve the requested data from such table.

Abstract: The switch port at which traffic associated with a specified media access control (MAC) address originates is searched for in a local area network (LAN). One or more switches receive a broadcast discovery message on a LAN subnet. Each switch determines whether the MAC address identified by the discovery message is associated with one of its ports. If the switch determines that the MAC address is associated with one of its ports, then the switch determines whether that port defines an edge of a searchable space. If the switch determines that that port defines an edge of the searchable space, then the switch issues a response message identifying the switch and the port.

Abstract: Methods, systems, and apparatus for Passive Optical Network (PON) wavelength bonding are disclosed. In one aspect, a first frame of data to a first optical network unit (ONU) is transmitted by an optical line terminal (OLT) over a first wavelength. While the first frame of data is being transmitted to the first ONU over the first wavelength, a first portion of a second frame of data to a second ONU is transmitted by the OLT over a second wavelength. After transmission of the first frame of data over the first wavelength has completed and while the first portion of the second frame of data is still being transmitted to the second ONU over the second wavelength, a second portion of the second frame of data to the second ONU is transmitted by the OLT over the first wavelength.

Abstract: An authentication relay and a NAT module of a telecommunication system facilitate communication between authentication clients and an authentication server. The authentication relay identifies authentication messages from the authentication clients intended for the authentication server. The authentication relay repackages the identified authentication message to add additional information. The NAT module translates the private IP address and UDP port number of the authentication client included in the original authentication message into a public IP address and unique UDP port number included with the repackaged authentication message sent to the authentication server. The same public IP address is used for authentication messages from a plurality of authentication clients thereby reducing the number of IP addresses required by the system.

Abstract: Methods, systems, and apparatus for crosstalk avoidance in a telecommunications network are disclosed. In one aspect a telecommunications device includes a transceiver and a vectoring engine coupled to the transceiver. The vectoring engine can include a vectoring processor and vectoring control entity (e.g., apparatus). The vectoring engine is configured to instruct the transceiver to transmit, over a given line pair of a given vectoring group, initialization symbols at one or more configurable locations of a Time-Division Duplex (TDD) frame. For example, the vectoring engine can instruct the transceiver to transmit the initialization symbols beginning at a first symbol time following transmission, over other line pairs of the given vectoring group, of a Robust Management Channel (RMC) symbol.