Patents Assigned to Calix Networks, Inc.
  • Patent number: 7318096
    Abstract: Techniques for reestablishing network address associations upon recovery of a passive optical network (PON) disablement relay on storage address association information. A network node stores address association information in non-volatile memory upon detecting a network disablement. Upon recovery of the PON from the disablement, the network node associates network addresses to clients in accordance with the address association information. The network node may further verify the associations by sending ARP queries for the network addresses to the associated clients. Alternatively, the network nodes may reestablish the address associations by tracking the length of time of the network disablement, and updating address association information in accordance with the length of the disablement.
    Type: Grant
    Filed: October 22, 2003
    Date of Patent: January 8, 2008
    Assignee: Calix Networks, Inc.
    Inventors: Christopher D. Koch, Duane M. Butler, Steven G. Knight, Bruce F. Naegele
  • Publication number: 20070195823
    Abstract: The disclosure describes communication of information between a network interface device and subscriber devices over a power line. A UPS unit receives operating power from subscriber premises via a first power line and delivers operating power to the network interface device via a second power line. The network interface device transmits and receives information, such as voice, video and data, to and from the UPS unit via the second power line. The UPS unit receives the information transmitted by the network interface device via the second power line, and transmits the received information to subscriber devices within the premises via the first power line. The UPS unit receives information transmitted by subscriber devices via the first power line, and transmits the received information to the network interface device via the second power line. The first and second power lines each serve as both a power line and a communication medium.
    Type: Application
    Filed: February 15, 2007
    Publication date: August 23, 2007
    Applicant: Calix Networks, Inc.
    Inventor: Mark Biegert
  • Patent number: 7187672
    Abstract: A processor is programmed to reduce a problem of adding a new connection to a time-space-time (TST) switch of a communication network into a problem of graph theory, and to solve the problem using a heuristic instead of an exact algorithm. A solution, if provided by the heuristic, is used to rearrange the connections in the TST switch. Several embodiments of such a programmed processor reduce a connection rearrangement problem of a TST switch into any one of the NP-complete problems (such as the vertex coloring problem or the boolean satisfiability (SAT) problem). In some such embodiments, the processor is programmed based on the Brélaz heuristic to find a solution to the vertex coloring problem. In other embodiments, other heuristics, such as a genetic algorithm, may be used.
    Type: Grant
    Filed: May 15, 2002
    Date of Patent: March 6, 2007
    Assignee: Calix Networks, Inc.
    Inventor: Meenaradchagan Vishnu
  • Publication number: 20060182144
    Abstract: A method of creating a signal encoded with a message for transmission from a line unit to a switch unit in a network element of a communication network includes arranging in the message a plurality of contiguous bytes of traffic and arranging in the message a plurality of contiguous nibbles of signaling wherein there is one nibble of signaling for each byte of traffic.
    Type: Application
    Filed: April 14, 2006
    Publication date: August 17, 2006
    Applicant: Calix Networks, Inc.
    Inventors: Jason Dove, Brian Semple, Andre Tanguay
  • Patent number: 7068672
    Abstract: A packet crosspoint works with an arbiter to control the number of packets being received at the input ports of the cross-connect from traffic sources coupled thereto. This is accomplished by monitoring the number of packets waiting in buffers in the output ports, as well as the number of other packets which the arbiter has already granted for transmission to the input ports of the cross-connect, but which have not as of yet been received in the output queue of the destination output port. An audit mechanism is included for ensuring that output port grant counters do not drift upward based on the fact that some granted packets are lost in the system.
    Type: Grant
    Filed: June 4, 2001
    Date of Patent: June 27, 2006
    Assignee: Calix Networks, Inc.
    Inventor: James W. Jones
  • Patent number: 7058011
    Abstract: A method and apparatus for effecting 1:1 or N:1 equipment protection switching in the line units of a voice-and-data access and transport network includes three sets of switches associated with the line units that can be selectively provisioned by the system operator into protect groups. In one embodiment, the switches are arranged and controlled within the protect groups by one or more dedicated microprocessors such that, upon the failure of a protected one of the line units in a protect group, the stream of traffic to an associated, protect one of the line units in the protect group is dropped, and the traffic stream to the failed line unit is switched over to the protect line unit for continued processing.
    Type: Grant
    Filed: February 26, 2001
    Date of Patent: June 6, 2006
    Assignee: Calix Networks, Inc.
    Inventors: Leo L. Stearns, Matthew K. Meeker
  • Patent number: 7035294
    Abstract: A point-to-point system for connecting a line card to a switching card using a transmission rate measured in gigabits per second.
    Type: Grant
    Filed: June 4, 2001
    Date of Patent: April 25, 2006
    Assignee: Calix Networks, Inc.
    Inventors: Jason Dove, Brian Semple, Andre Tanguay
  • Patent number: 7006497
    Abstract: Traffic is transported within a system in the form of TDM packets. These packets are generated at source line units and transported from the line units to a switch. The switch routes the packets to appropriate target line units based on information contained within the packet. At the switch, packets from the source line units may be merged. A gather function relies on each of the line units sourcing packets to exclusively drive lines at software-assigned timeslots within the packet. The switch performs a simple OR function of each byte in merging the packet payloads.
    Type: Grant
    Filed: June 4, 2001
    Date of Patent: February 28, 2006
    Assignee: Calix Networks, Inc.
    Inventors: Jason Dove, Brian Semple, Andre Tanguay, James Lotz
  • Patent number: 6980725
    Abstract: An outdoor enclosure for a remote terminal is designed so that a structure supporting protector modules (normally coupled between telephone lines and line cards to prevent damage from a surge in current or voltage) is easily reachable and removable. To upgrade from copper to fiber, the just-described hardware (also called “protect block”) is replaced with other hardware (also called “fiber fanout enclosure”) that supports adapters for receiving connectors of optical fibers. The protect block and the fiber fanout enclosure are designed to have approximately (or even exactly) the same footprint, so that they occupy at least some of the same space (before and after replacement). Reuse of the same space in this manner is advantageous over an outdoor enclosure designed to have additional space dedicated for adapters and fiber fanout enclosures to be added in future, because a more compact arrangement results from reuse of the same space.
    Type: Grant
    Filed: April 30, 2002
    Date of Patent: December 27, 2005
    Assignee: Calix Networks, Inc.
    Inventor: Paul D. Swieconek
  • Patent number: 6954811
    Abstract: An arbiter for a switch maintains a pair of counters for each flow of traffic at each input port: one counter (also called “first counter”) to indicate an ideal transfer of traffic, and another counter (also called “second counter”) to indicate the actual transfer of traffic. Both counters are incremented when traffic is received by the input port, and the second counter is decremented when a unit of traffic (such as a cell or packet) is about to be transmitted whereas the first counter is decremented in a fractional manner (relative to the unit of traffic) in each period of arbitration, based on available bandwidth. The arbiter selects one of the output ports (also called “winning output port”) of the switch, based at least partially on values of the two counters for each flow from the input port to one of the output ports, and generates a signal to approve transfer of traffic from the input port to the winning output port.
    Type: Grant
    Filed: July 19, 2002
    Date of Patent: October 11, 2005
    Assignee: Calix Networks, Inc.
    Inventor: Meenaradchagan Vishnu
  • Patent number: 6952395
    Abstract: A method for protecting the flows of traffic against, and for restoring them from, a failure in a multifunctional, hybrid broadband access-and-transport network system includes the provisioning of at least two Virtual Flows (“VFs”) of traffic between each pair of ingress and egress (“I/E”) nodes in the system. The at least two VFs are provisioned such that each takes a different physical path from the other. The VFs taking the same physical path are then respectively grouped into two “Path Protection Groups” (“PPGs”). Each of the PPGs has a dedicated “Management Control Flow” (“MCF”) provisioned within it that is carried in the at least one VF contained therein. The detection of a fault in the traffic in an “active” PPG results in the generation of a protection switching signal (“PSS”) being generated and sent by the nodes detecting the fault along the MCF of the affected PPG to the relevant “protection switching entities” (“PSEs”), i.e.
    Type: Grant
    Filed: June 1, 2001
    Date of Patent: October 4, 2005
    Assignee: Calix Networks, Inc.
    Inventors: Madan Manoharan, Aravind Gopalan, Srikanth R. Vadi
  • Patent number: 6793521
    Abstract: In accordance with this invention, an angled female SMB plug includes a first tubular main body and a tubular wire exit extending approximately 45 degrees from the main body. The main body is chamfered at one end to produce a flat end surface that is approximately parallel with the wire exit. The outer diameter of the main body is approximately 89 percent of a pitch between adjacently mounted plugs and the outer diameter of the wire exit is approximately 59 percent of the same pitch.
    Type: Grant
    Filed: January 16, 2002
    Date of Patent: September 21, 2004
    Assignee: Calix Networks, Inc.
    Inventor: Darin P. Smedberg
  • Patent number: 6728103
    Abstract: A heat sink extends beyond the outer boundaries of a component cooled by the heat sink. In one embodiment, the heat sink may have a cutout shaped and located so that a protruding portion of a clip can extend through the cutout from one surface of the heat sink and mechanically fasten the component to another surface of the heat sink. There may be more than one cutout. Heat transfer values can be optimized by adjusting the number and the location of the cutouts and the size of the heat sink relative to the component and the fastening mechanism (e.g., a clip). In another embodiment, the clip that extends through the cutout holds the heat sink against a motherboard, pressing against a component located between the heat sink and the motherboard.
    Type: Grant
    Filed: February 5, 2002
    Date of Patent: April 27, 2004
    Assignee: Calix Networks, Inc.
    Inventor: Darin P. Smedberg
  • Patent number: 6692132
    Abstract: A faceplate (indicating operation status of an apparatus) includes a bezel and a light-pipe, which are integrated into a piece. The faceplate can be injection-molded with an optically clear plastic. The light-pipe includes a lens and a light guide. The lens focuses light from a light source toward the light guide and is shaped so as to focus and collect the light within a boundary of the light guide. The surface of the light guide includes a number of mini refracting lenses to promote illumination of the light. Alternatively, an ink can be applied on the surface of the light guide to promote the illumination of the light. Further, a diffusing lens can be formed on the surface of the light guide to promote illumination of the, light. The faceplate can include multiple light-pipes.
    Type: Grant
    Filed: February 21, 2002
    Date of Patent: February 17, 2004
    Assignee: Calix Networks, Inc.
    Inventor: Matthew K. Meeker
  • Patent number: 6661663
    Abstract: A combination device includes an optical fiber guide connected to a fastener for attaching a heatsink to a component and/or to be printed circuit board. As a component on a printed circuit board usually needs to be fastened to a heatsink for cooling, combining a heatsink fastener and a fiber guide allows a more efficient use of board space than using a fiber guide and a heatsink fastener separately. In one embodiment, the device includes a frame, one or more fiber guides attached to the frame, and one or more fasteners (e.g., a snap-on mechanism) connected to the frame. The frame may generally have a rectangular shape, with fiber guides attached to the four corners of the rectangular frame and fasteners attached to the side of the rectangular frame. The fiber guide may be designed to protect the fragile optical fiber and prevent bending of the cable beyond its minimum bend radius.
    Type: Grant
    Filed: February 5, 2002
    Date of Patent: December 9, 2003
    Assignee: Calix Networks, Inc.
    Inventor: Matthew K. Meeker
  • Patent number: 6568133
    Abstract: An outdoor enclosure including a main compartment housing electronic components and a door coupled to the main compartment. A beverage holder tray is mounted on an inner surface of the door. The beverage holder tray may be folded into a closed position and unfolded into an open position.
    Type: Grant
    Filed: February 21, 2002
    Date of Patent: May 27, 2003
    Assignee: Calix Networks, Inc.
    Inventor: Jane Rodgers