Patents by Inventor Robert W. Cantwell
Robert W. Cantwell has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7912074Abstract: Telecommunication equipment of the present invention includes a switch for receiving data from a plurality of ports and inserting a unique port identifier in the data from each port to identify the source port of the data. The equipment also includes a multiplexer coupled to the switch and operable to multiplex the data from the plurality of ports into a single serial data stream. A method of the present invention includes the steps of receiving data from a plurality of ports, adding a unique port identifier to the data from each port to identify the port from which the data came, and multiplexing the data from the plurality of ports into a single data stream for transmission.Type: GrantFiled: August 3, 2001Date of Patent: March 22, 2011Assignee: Fujitsu LimitedInventor: Robert W. Cantwell
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Patent number: 7633971Abstract: A transport unit is disclosed. On a transmit side, the transport unit includes a payload data unit (PDU) formation unit, a frame formation unit and a scheduler. An input of the scheduler is coupled to the PDU formation unit, and an output of the scheduler is coupled to the frame formation unit. On a receive side, the transport unit includes a distribution unit (which includes a group synchronization unit), a channel resequencing unit (coupled to the group synchronization unit), and a scheduler (coupled to the channel resequencing unit).Type: GrantFiled: March 31, 2003Date of Patent: December 15, 2009Assignee: Ceterus Networks, Inc.Inventors: Robert K. Butler, William C. Szeto, Robert W. Cantwell, Rajendra R. Damle, Debasish Nag
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Patent number: 7586950Abstract: A system and method for remote management of a network device is disclosed. The system includes a network device controller and a transmit unit coupled to the network device controller. The transmit unit includes a remote management interface queue and a remote management interface. The remote management interface couples the network device controller to the remote management interface queue.Type: GrantFiled: March 31, 2003Date of Patent: September 8, 2009Assignee: Ceterus Networks, Inc.Inventors: Rajendra R. Damle, Robert W. Cantwell, Jack R. Carrell, Steven C. Deans, Trevis M. Lunsford, Rakesh G. Raja, Troy D. Robinson
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Patent number: 7408939Abstract: A method, system and transport unit to combine and transport multiple variable data rate LAN streams and fixed data rate voice streams through a plurality of transmission links used as a conduit for transmission of data between local area networks are disclosed. Combining both TDM and packetized network traffic into packets for transfer between LANs using a framed protocol for the transfer is further disclosed.Type: GrantFiled: September 9, 2004Date of Patent: August 5, 2008Assignee: Ceterus Networks, Inc.Inventors: Rajendra R. Damle, Troy D. Robinson, Robert K. Butler, Robert W. Cantwell, Justin Hunt, Robert Dittmar
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Patent number: 6590899Abstract: A telecommunications network (12) includes a digital cross-connect system (10) that receives frame relay information carried in individual DS-0 signals over T-1 links (14) and/or multiple DS-0 signals over FT-1 links (16). The digital cross-connect system (10) includes a cross-connect matrix (44) that consolidates DS-0 signals into DS-1 signals. The digital cross-connect system (10) further includes a plurality of frame groomers (40) that extract frames from each DS-0 signal for consolidation into a frame groomed consolidated circuit. The frame groomed consolidated circuit from each frame groomer (40) is transferred in DS-3 signals to a concentrator (80). The concentrator (80) concentrates the received DS-3 signals into a single DS-3 signal for transport to an edge switch (24).Type: GrantFiled: September 4, 1998Date of Patent: July 8, 2003Assignee: Alcatel USA Sourcing, L.P.Inventors: Shaji A. Thomas, Robert W. Cantwell
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Publication number: 20020181486Abstract: Telecommunication equipment of the present invention includes a switch for receiving data from a plurality of ports and inserting a unique port identifier in the data from each port to identify the source port of the data. The equipment also includes a multiplexer coupled to the switch and operable to multiplex the data from the plurality of ports into a single serial data stream. A method of the present invention includes the steps of receiving data from a plurality of ports, adding a unique port identifier to the data from each port to identify the port from which the data came, and multiplexing the data from the plurality of ports into a single data stream for transmission.Type: ApplicationFiled: August 3, 2001Publication date: December 5, 2002Inventor: Robert W. Cantwell
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Patent number: 6370155Abstract: A network interface card (100) includes a line interface unit (102) operable to receive inbound network telecommunications signals having one of a plurality of first formats. A transceiver framer unit (104) converts the inbound network telecommunications signals from the first format to a second format. A matrix interface unit (106) transports the inbound network telecommunications signals having the second format to a pair of redundant switching matrix planes (A, B). The matrix interface unit (106) also receives outbound, network telecommunications signals having the second format from the redundant switching planes (A, B) for transport to the transceiver framer unit (104). The transceiver framer unit (104) converts the outbound network telecommunications signals from the second format to an appropriate first format for transport to network elements through the line interface unit (102).Type: GrantFiled: December 31, 1997Date of Patent: April 9, 2002Assignee: Alcatel USA Sourcing, L.P.Inventors: Robert W. Cantwell, Michael H. Jette
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Patent number: 6160806Abstract: A network interface card (100) includes a line interface unit (102) operable to receive inbound network telecommunications signals having one of a plurality of first formats. A transceiver framer unit (104) converts the inbound network telecommunications signals from the first format to a second format. A matrix interface unit (106) transports the inbound network telecommunications signals having the second format to a pair of redundant switching matrix planes (A, B). The matrix interface unit (106) also receives outbound, network telecommunications signals having the second format from the redundant switching planes (A, B) for transport to the transceiver framer unit (104). The transceiver framer unit (104) converts the outbound network telecommunications signals from the second format to an appropriate first format for transport to network elements through the line interface unit (102).Type: GrantFiled: December 31, 1997Date of Patent: December 12, 2000Assignee: Alcatel USA Sourcing, L.P.Inventors: Robert W. Cantwell, Michael H. Jette
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Patent number: 6122273Abstract: A line interface selection circuit comprises a bus switch operable to receive signals from a plurality of line interface units and to facilitate a connection between at least one of the plurality of line interface units and a telecommunication network. The bus switch is coupled to a line interface transformer having a primary side and a secondary side.Type: GrantFiled: December 10, 1997Date of Patent: September 19, 2000Assignee: Alcatel USA Sourcing, L.P.Inventors: Robert W. Cantwell, Gregory J. Waldschmidt
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Patent number: 6064706Abstract: A digital desynchronizer (10) includes an elastic store unit (12) that receives a synchronously mapped asynchronous data signal (14) and outputs asynchronous output data over an asynchronous output data signal (20) in response to an output clock signal (22). The output clock signal (22) is generated by a digitally controlled oscillator (24). The digitally controlled oscillator (24) receives a speed up signal (28) and a slow down signal (30) from a jitter accumulator (26) in order to adjust the clock rate of the output clock signal (22). The jitter accumulator (26) compares retimed read address information (32) to write address information (34) from the elastic store unit (12), subtracts an initial bias, adds the result to any previous sum, and compares this final result to programmable threshold levels in order to determine whether or not to assert the speed up signal (28) or the slow down signal (30).Type: GrantFiled: December 31, 1996Date of Patent: May 16, 2000Assignee: Alcatel USA, Inc.Inventors: Raymond K. Driskill, Michael J. Hanlon, Robert W. Cantwell, John C. Bellamy
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Patent number: 5982744Abstract: A high density unit shelf (22) is provided for use with a digital switch such as a digital cross-connect system (10). The high density unit shelf (22) provides redundant interfacing capability and may be configured in a redundant configuration, a non-redundant configuration, or combinations thereof. The high density unit shelf (22) generally includes a plurality of network interface port pairs, such as a network interface port (52) and (56), a plurality of network connectors, such as a receive network connector (50) and a transmit network connector (54), a plurality of first matrix connectors, such as a matrix connector (70), and a plurality of second matrix connectors such as a matrix connector (72). The network interface port pair receives a first network interface card at the network interface port (52) and a second network interface card at the network interface port (56).Type: GrantFiled: August 14, 1997Date of Patent: November 9, 1999Assignee: Alcatel USA Sourcing, L.P.Inventors: Robert W. Cantwell, Michael H. Jette
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Patent number: 5917827Abstract: A multiple rate network interface (42) is provided to interface a telecommunication network and a digital telecommunication switch (48). The multiple rate network interface (42) may operate in at least a first mode and a second mode. The first mode allows telecommunication signals in a first format to be exchanged between a telecommunication network and the digital telecommunication switch (48). The second mode allows telecommunication signals in a second format to be exchanged between a telecommunication network and the digital telecommunication switch (48). The first format may be synchronous transport protocol level one (STS-1) and the second format may be digital signal level three (DS3). The multiple rate network interface (42) includes a first processing circuit, a second processing circuit, and a control circuit. The first processing circuit may include a bipolar interface (60), an STS-1 terminator (64), a signal switching circuitry (70), a VT 1.5 terminator (66), and a payload processor (68).Type: GrantFiled: December 3, 1996Date of Patent: June 29, 1999Assignee: Alcatel USA Sourcing, L.P.Inventor: Robert W. Cantwell
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Patent number: 5689535Abstract: A method and apparatus for processing a plurality of facility datalinks is provided. In particular, synchronizers (14 and 16) receive multiple facility datalinks and synchronize them. These synchronized signals are transmitted to FDL state machine (18). FDL state machine (18) separately stores each of the facility datalinks in a memory (20). A processor (22) accesses the facility datalinks stored within memory (20) and initiates responses based on the accessed facility datalinks.Type: GrantFiled: November 15, 1994Date of Patent: November 18, 1997Assignee: DSC Communications CorporationInventors: Robert W. Cantwell, Steven D. Sensel