Assignee: Tellabs Petaluma, Inc.

Location: Petaluma, CA
No. of patents: 27

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Number	Title	Issue Date
7522598	System and method of protecting an IGMP proxy An Internet Group Multicast Protocol (IGMP) proxy provides network redundancy to prevent a severed or damaged line, or a malfunctioning router interface from denying services to the IGMP proxy by outputting the multicast group addresses that are received by the IGMP...	04/21/2009
7489692	Method and system for ATM virtual circuit numbering A system and method for providing identifying numbers for virtual circuits and virtual paths in a network is described. The system and method make use of a predetermined group of identifying numbers such that each number corresponds to a particular communication typ...	02/10/2009
7486612	Fault-tolerant multicasting network A multicasting network includes a number of routers that are connected together to form a ring. The routers include a source router that identifies incoming multicasting data packets, and forwards the multicasting data packets in both directions on the ring. The rou...	02/03/2009
7472313	Primary server and backup server that share an IP address and a limited number of message identifiers A primary server and a backup server that both run a RADIUS client in a cold start configuration share a single IP address that includes a limited number of message identifiers (MIDs). The primary server and the backup server each have a small number of fixed messag...	12/30/2008
7468958	Optical line terminal that detects and identifies a rogue ONT An optical line terminal (OLT) determines when an optical network terminal (ONT) has become a rogue ONT, and then identifies the rogue ONT so that service can be restored. The OLT identifies the rogue ONT by comparing the received power levels with the levels that w...	12/23/2008
7437495	Method and apparatus for assigning bus grant requests Access to a bus is granted to one of a number of requesting communication circuits that each submitted a bus control request during a request period of an arbitration period in response to the entries in a priority table. If a requesting communication circuit has an...	10/14/2008
7424221	Optical network terminal with illegal transmission detection circuitry An optical network terminal, which includes an optical transmitter, monitors the status of the optical transmitter, such as the output or the power consumption of the optical transmitter, to determine when the optical transmitter is illegally transmitting. When an i...	09/09/2008
7342814	Content addressable memory with reduced search current and power The power required to search a content addressable memory (CAM) is substantially reduced by forming the CAM to have a number of CAM banks with a corresponding number of power switches that control power to the CAM banks, and then controlling the power to search the ...	03/11/2008
7305575	Interface circuit that interconnects a media access controller and an optical line termination transceiver module A communication system includes an interface that allows a media access controller (MAC) and an optical line termination transceiver module (TM), which have incompatible interfaces, to be connected together. The interface detects a phase relationship required by the...	12/04/2007
7287175	Optical network terminal with low-power sleep logic that substantially extends the life of the battery after the AC main power supply has been lost An optical network terminal includes a sleep logic circuit that assumes responsibility for monitoring off-hook transitions after the AC main power supply has failed for a predetermined period of time. The sleep logic circuit is very low power and, as a result, allow...	10/23/2007
7274881	Optical line terminal and method that store the identity numbers of a number of optical network terminals that are associated with a single network end point The memory of the optical line terminal (OLT) of a broadband passive optical network (BPON) is increased to store, in addition to an active identity number, such as the serial number, of the current optical network terminal (ONT) connected to a network end point, a ...	09/25/2007
7274712	System and method of operating the system that responds to channel change requests without causing macro-blocking A router stores a value that indicates the maximum number of channels that can be output to a group, and the number of channels that are output to the group. When a member of the group indicates a channel change selection from a first channel to a second channel, th...	09/25/2007
7243417	Device for circuit board insertion and extraction An apparatus for facilitating the insertion and extraction of a PC board into and from a card cage, comprising a mounting body, an engager, and an actuator. In a preferred embodiment, the apparatus has a ring-shaped mounting body having a clearance hole therethrough...	07/17/2007
7240142	Master electronics card with an adaptive bandwidth circuit The bus circuit of a master electronics card in a backplane-based communications system adaptively grants the upstream bus to the slave electronics cards by the early termination of a scheduled number of grants to a slave electronics card when the bus circuit on the...	07/03/2007
7228459	Apparatus and method that provides a primary server and a backup server that both support a RADIUS client and share an IP address A primary server and a backup server that both run a RADIUS client in a cold start configuration share a single IP address that includes a limited number of message identifiers (MIDs). The primary server and the backup server each have a small number of fixed messag...	06/05/2007
7222660	Cabinet with an environmentally-sealed air-to-air heat exchanger A cabinet which utilizes an air-to-air heat exchanger to remove heat generated from within the cabinet prevents water and dust from entering the air-to-air heat exchanger by forcing cooler external air up along a first side wall, through the air-to-air heat exchange...	05/29/2007
7218723	Next-generation network that reduces the effect of a service failure A next-generation network utilizes a three-tier, cascading fault approach to providing emergency stand-alone (ESA) switching in a circuit-to-packet (C2P) network. Calls that are placed to destination numbers which are connected to the same local network device are c...	05/15/2007
7204105	Tamper-proof latch cover A latch in a door is protected from an unauthorized entry by forming a first bracket that fits around the latch, and a second bracket that is rotatably connected to the first latch. The second bracket covers the latch when rotated to be in a first position, and expo...	04/17/2007
7200732	Method and apparatus of adding grant information to a memory A scrambling operation is used to space apart the grants that a communication circuit receives during a period of time, such as 512 arbitration periods. An operator can enter the number of arbitration periods that a communication circuit is to receive in blocks of s...	04/03/2007
7170755	Electronics card with an alignment opening An electronics card, such as a backplane, is precisely aligned with a structure, such as a card cage, via alignment tabs by forming the electronics card to have alignment openings that extend through the electronics card and snuggly accept the tabs. The alignment op...	01/30/2007
7108052	Low-cost method of forming a heat exchanger with an increased heat transfer efficiency The efficiency of a heat exchanger is significantly improved by forming walls in an air flow structure, which has first grooves formed in the top surface of the structure and second grooves formed in the bottom surface of the structure, that block off alternating en...	09/19/2006
7065594	Method and apparatus of allocating minimum and maximum bandwidths on a bus-based communication system Access to a bus is granted to one of a number of requesting communication circuits that each submitted a bus control request during a request period of an arbitration period in response to the entries in a priority table. If a requesting communication circuit has an...	06/20/2006
7065593	Centralized, double bandwidth, directional, shared bus communication system architecture A low-cost, high-speed, bus-based communication system is provided that includes a master electronics card, a number of slave electronics cards, and a backplane that interconnects the master and the slave electronics cards via a serial bus, a parallel bus and some c...	06/20/2006
7056138	Retaining clip for Anderson-type power connectors When a first pair of power connectors are inserted into a second pair of power connectors, the connectors are prevented from electrically and physically separating by a retaining clip that fits into the locking opening between the first pair of power connectors, and...	06/06/2006
7011148	Heat exchanger with increased heat transfer efficiency and a low-cost method of forming the heat exchanger The efficiency of a heat exchanger is significantly improved by connecting walls to an air flow structure, which has first grooves formed in the top surface of the structure and second grooves formed in the bottom surface of the structure, that block off alternating...	03/14/2006
7006400	Content addressable memory with reduced instantaneous current and power consumption during a search The power required to search a content addressable memory (CAM) is substantially reduced by forming the CAM to have a number of CAM banks with a corresponding number of power switches that control power to the CAM banks, and then controlling the power to search the ...	02/28/2006
7003609	Method and apparatus of allocating minimum and maximum bandwidths on a bus-based communication system with redundant communication circuits Access to a bus is granted to one of a number of requesting communication circuits that each submitted a bus control request during a request period of an arbitration period in response to grant information which can be stored in a primary and a backup priority tabl...	02/21/2006

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Assignee: Tellabs Petaluma, Inc.