Patents by Inventor Ramon C.W. Chea
Ramon C.W. Chea 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: 6937157Abstract: The present invention to provide a “smart cable system” for high density metallic cross connect systems. In particular, this invention relates to the physical structure of cables and associated hardware needed to form the “smart cable system” for interconnecting cards in shelves and racks of high density metallic cross connect switching systems. This invention provides the cable installer the ability to connect cables to cards with minimal errors by using visual indicators. The visual indicators guide the cable installer such that he/she can properly install the cables into the appropriate connectors. The present invention also provides a means for detecting when and where the cables are connected within the cross connect system.Type: GrantFiled: May 13, 2002Date of Patent: August 30, 2005Assignee: Turnstone Systems, Inc.Inventors: Ramon C. W. Chea, Jr., P. Kingston Duffie, Timothy John Hodgkinson
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Patent number: 6903939Abstract: The present invention discloses a physical shelf architecture for high density metallic cross connect systems. The present invention is intended to overcome the problems associated with the physical interconnections of metallic paths in cross connect switching systems. The physical architecture of the present invention effectively performs physical interconnections required by high density metallic cross connect systems. The physical architecture enables for a scalable design and structure of racks and shelves. In particular, inter-connect levels can be performed with devices-to-devices, boards-to-boards, shelves-to-shelves, and racks-to-racks.Type: GrantFiled: April 19, 2002Date of Patent: June 7, 2005Assignee: Turnstone Systems, Inc.Inventors: Ramon C. W. Chea, Jr., P. Kingston Duffie, Timothy John Hodgkinson
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Patent number: 6870724Abstract: The present invention discloses systems and methods for protecting electronic devices (switching and non-switching) such as micro electro-mechanical system (MEMS) devices and solid state relays due to lightning exposure or electrical power surges in double end exposed systems. Over voltage suppressors and over current detectors are used to limit the exposure of high voltages and currents to the MEMS and solid-state relay devices in double end exposed systems.Type: GrantFiled: January 22, 2004Date of Patent: March 22, 2005Assignee: Turnstone Systems, Inc.Inventor: Ramon C. W. Chea, Jr.
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Publication number: 20040150936Abstract: The present invention discloses systems and methods for protecting electronic devices (switching and non-switching) such as micro electro-mechanical system. (MEMS) devices and solid state relays due to lightning exposure or electrical power surges in double end exposed systems. Over voltage suppressors and over current detectors are used to limit the exposure of high voltages and currents to the MEMS and solid-state relay devices in double end exposed systems.Type: ApplicationFiled: January 22, 2004Publication date: August 5, 2004Inventor: Ramon C.W. Chea
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Patent number: 6741675Abstract: The invention presented herein is directed to a battery injection and loop supervision (BILS) system and method that can be used in the DSL environment. The BILS of the present invention provides battery injection, loop supervision, and butt set operation mode detection in the DSL environment. A voltage source, detector and comparator in the BILS unit can be used to supervise the copper loop status from the central office. In addition, using the present invention, a field technician using a conventional butt set can detect battery voltage and receive an audible tone from the cooper loops in the DSL environment. Furthermore, the BILS can be implemented in accordance with two preferred embodiments, voltage sensing and current sensing. The BILS includes circuitry, working in conjunction with a shared common resource card and a conventional butt set, for testing, maintaining, and installing copper loops in the DSL environment.Type: GrantFiled: July 23, 2001Date of Patent: May 25, 2004Assignee: Turnstone Systems, Inc.Inventors: Ramon C. W. Chea, Jr., P. Kingston Duffle
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Patent number: 6700770Abstract: The present invention discloses systems and methods for protecting electronic devices (switching and non-switching) such as micro electro-mechanical system (MEMS) devices and solid state relays due to lightning exposure or electrical power surges in double end exposed systems. Over voltage suppressors and over current detectors are used to limit the exposure of high voltages and currents to the MEMS and solid-state relay devices in double end exposed systems.Type: GrantFiled: March 22, 2002Date of Patent: March 2, 2004Assignee: Turnstone Systems, Inc.Inventor: Ramon C. W. Chea, Jr.
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Patent number: 6683768Abstract: The present invention discloses systems and methods for protecting electronic devices (switching and non-switching) such as micro electro-mechanical system (MEMS) devices and solid state relays due to lightning exposure or electrical power surges. An over voltage protector and an over current protector are used to limit the exposure of high voltages and currents to the MEMS devices and solid-state relays. A relay or equivalent device is energized when a high current is sensed in the loop, which relay is used to protect the MEMS devices and solid state relays from damage. The relay can be controlled via software/hardware and works in conjunction with other components/devices in the overall systems. In this manner, any number of MEMS devices or solid state relays can be protected.Type: GrantFiled: February 6, 2002Date of Patent: January 27, 2004Assignee: Turnstone Systems, Inc.Inventor: Ramon C. W. Chea, Jr.
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Patent number: 6671149Abstract: The present invention discloses systems and methods for protecting electronic devices (switching and non-switching) such as micro electro-mechanical system (MEMS) devices and solid state relays due to lightning exposure or electrical power surges. An over voltage protector and an over current protector are used to limit the exposure of high voltages and currents to the MEMS devices and solid-state relays. A relay or equivalent device is energized when a high current is sensed in the loop, which relay is used to protect the MEMS devices and solid state relays from damage. The relay can be controlled via software/hardware and works in conjunction with other components/devices in the overall systems. In this manner, any number of MEMS devices or solid state relays can be protected.Type: GrantFiled: September 28, 2000Date of Patent: December 30, 2003Assignee: Turnstone Systems, Inc.Inventors: Ramon C. W. Chea, Jr., P. Kingston Duffie, Harry Rodriguez, Robert Crofford
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Publication number: 20030179527Abstract: The present invention discloses systems and methods for protecting electronic devices (switching and non-switching) such as micro electro-mechanical system (MEMS) devices and solid state relays due to lightning exposure or electrical power surges in double end exposed systems. Over voltage suppressors and over current detectors are used to limit the exposure of high voltages and currents to the MEMS and solid-state relay devices in double end exposed systems.Type: ApplicationFiled: March 22, 2002Publication date: September 25, 2003Inventor: Ramon C.W. Chea
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Publication number: 20030179859Abstract: The invention presented herein is directed to a battery injection and loop supervision (BILS) system and method that can be used in the DSL environment. The BILS of the present invention provides battery injection, loop supervision, and butt set operation mode detection in the DSL environment. A voltage source, detector and comparator in the BILS unit can be used to supervise the copper loop status from the central office. In addition, using the present invention, a field technician using a conventional butt set can detect battery voltage and receive an audible tone from the cooper loops in the DSL environment. Furthermore, the BILS can be implemented in accordance with two preferred embodiments, voltage sensing and current sensing. The BILS includes circuitry, working in conjunction with a shared common resource card and a conventional butt set, for testing, maintaining, and installing copper loops in the DSL environment.Type: ApplicationFiled: July 23, 2001Publication date: September 25, 2003Applicant: Turnstone Systems, Inc.Inventors: Ramon C.W. Chea, P. Kingston Duffle
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Patent number: 6574309Abstract: The present invention is directed to a remotely actuated splitter bypass function (RASB) working in conjunction with a test head at the central office for testing and maintaining copper loops in the digital subscriber line environment. The RASB allows a competitive local exchange carrier to test and maintain the xDSL portion of the copper loop with minimal interference and disturbance to/from the plain old telephone system (POTS) service by bypassing the central office splitter. The splitter bypass operation includes the steps of selecting a copper loop pair for testing, actuating a first relay for monitor mode, actuating a second relay for bypass mode, testing the selected copper loop, and resetting the first and second relays back to normal mode. By applying positive and negative voltages from the tip and ring with respect to ground, various relays can be set (actuated) and reset to provide multiple modes of operations.Type: GrantFiled: March 1, 2000Date of Patent: June 3, 2003Assignee: Turnstone Systems, Inc.Inventors: Ramon C. W. Chea, Jr., P. Kingston Duffie
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Patent number: 6574313Abstract: The present invention relates to a system and method for providing a “lifeline” service to a VoDSL customer despite an electrical power outage or integrated access device failure at the customer premise. A bypass function is implemented in an integrated access device at the customer premise to provide the lifeline service. The bypass function is preferably a relay, which can be automatically activated to provide the lifeline service under various conditions. The bypass relay, working in conjunction with systems in the central office and the regional switching center allows the customer to obtain an active telephone line during power outages or integrated access device failures. Electrical power is also supplied to the customer's premise from the central office, thereby allowing the customer to use a telephone line in the traditional manner. The present invention can further be implemented for any number of customers and telephone lines.Type: GrantFiled: May 12, 2000Date of Patent: June 3, 2003Assignee: Turnstone Systems, Inc.Inventors: Ramon C. W. Chea, Jr., P. Kingston Duffie
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Patent number: 6553105Abstract: The present invention is directed to a remotely actuated splitter bypass function (RASB) working in conjunction with a test head at the central office for testing and maintaining copper loops in the digital subscriber line environment. The RASB allows a competitive local exchange carrier to test and maintain the xDSL portion of the copper loop with minimal interference and disturbance to/from the plain old telephone system (POTS) service by bypassing the central office splitter. The splitter bypass operation includes the steps of selecting a copper loop pair for testing, actuating a first relay for monitor mode, actuating a second relay for bypass mode, testing the selected copper loop, and resetting the first and second relays back to normal mode. By applying positive and negative voltages from the tip and ring with respect to ground, various relays can be set (actuated) and reset to provide multiple modes of operations.Type: GrantFiled: April 30, 2002Date of Patent: April 22, 2003Assignee: Turnstone Systems, Inc.Inventors: Ramon C. W. Chea, Jr., P. Kingston Duffie
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Patent number: 6546089Abstract: The present invention relates to systems and methods for providing a “lifeline” service to a VoDSL customer despite an electrical power outage or integrated access device failure at the customer premise. A bypass function is implemented in an integrated access device at the customer premise to provide the lifeline service. The bypass function is preferably a relay, which can be automatically activated to provide the lifeline service under various conditions. The bypass relay, working in conjunction with systems in the central office and the regional switching center allows the customer to obtain an active telephone line during power outages or integrated access device failures. Electrical power is also supplied to the customer's premise from the central office, thereby allowing the customer to use a telephone line in the traditional manner. The present invention can further be implemented for any number of customers and telephone lines.Type: GrantFiled: May 26, 2000Date of Patent: April 8, 2003Assignee: Turnstone Systems, Inc.Inventors: Ramon C. W. Chea, Jr., P. Kingston Duffie
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Patent number: 6480575Abstract: The present invention is directed to a remotely actuated splitter bypass function (RASB) working in conjunction with a test head at the central office for testing and maintaining copper loops in the digital subscriber line environment. The RASB allows a competitive local exchange carrier to test and maintain the xDSL portion of the copper loop with minimal interference and disturbance to/from the plain old telephone system (POTS) service by bypassing the central office splitter. The splitter bypass operation includes the steps of selecting a copper loop pair for testing, actuating a first relay for monitor mode, actuating a second relay for bypass mode, testing the selected copper loop, and resetting the first and second relays back to normal mode. By applying positive and negative voltages from the tip and ring with respect to ground, various relays can be set (actuated) and reset to provide multiple modes of operations.Type: GrantFiled: April 30, 2002Date of Patent: November 12, 2002Assignee: Turnstone Systems, Inc.Inventors: Ramon C. W. Chea, Jr., P. Kingston Duffie
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Publication number: 20020131568Abstract: The present invention is directed to a remotely actuated splitter bypass function (RASB) working in conjunction with a test head at the central office for testing and maintaining copper loops in the digital subscriber line environment. The RASB allows a competitive local exchange carrier to test and maintain the xDSL portion of the copper loop with minimal interference and disturbance to/from the plain old telephone system (POTS) service by bypassing the central office splitter. The splitter bypass operation includes the steps of selecting a copper loop pair for testing, actuating a first relay for monitor mode, actuating a second relay for bypass mode, testing the selected copper loop, and resetting the first and second relays back to normal mode. By applying positive and negative voltages from the tip and ring with respect to ground, various relays can be set (actuated) and reset to provide multiple modes of operations.Type: ApplicationFiled: April 30, 2002Publication date: September 19, 2002Inventors: Ramon C.W. Chea, P. Kingston Duffie
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Patent number: 6453016Abstract: The invention presented herein is directed to a remotely addressable maintenance unit (RAMU) working in conjunction with a test head at the central office for detecting and locating faults in digital subscriber loop (DSL) and/or plain old telephone system (POTS) environments. The RAMU includes circuitry for setting and resetting one or more relays for either normal or testing/maintenance mode. The present invention provides a system and method for addressing the RAMU by applying either positive or negative voltages from the tip to ground, from ring to ground, and from tip and ring to ground. In this manner, individual RAMUs can be defined/designed to respond in certain voltage levels and polarities. Accurate fault detection and sectionalization is achieved by the combination of the addressing capabilities enumerated herein, and the impedance signature designed into the RAMU, working in concert with a test head in the central office.Type: GrantFiled: September 27, 2001Date of Patent: September 17, 2002Assignee: Turnstone Systems, Inc.Inventor: Ramon C. W. Chea, Jr.
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Publication number: 20020122539Abstract: The present invention is directed to a remotely actuated splitter bypass function (RASB) working in conjunction with a test head at the central office for testing and maintaining copper loops in the digital subscriber line environment. The RASB allows a competitive local exchange carrier to test and maintain the xDSL portion of the copper loop with minimal interference and disturbance to/from the plain old telephone system (POTS) service by bypassing the central office splitter. The splitter bypass operation includes the steps of selecting a copper loop pair for testing, actuating a first relay for monitor mode, actuating a second relay for bypass mode, testing the selected copper loop, and resetting the first and second relays back to normal mode. By applying positive and negative voltages from the tip and ring with respect to ground, various relays can be set (actuated) and reset to provide multiple modes of operations.Type: ApplicationFiled: April 30, 2002Publication date: September 5, 2002Inventors: Ramon C.W. Chea, P. Kingston Duffie
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Publication number: 20020089804Abstract: The present invention discloses systems and methods for protecting electronic devices (switching and non-switching) such as micro electromechanical system (MEMS) devices and solid state relays due to lightning exposure or electrical power surges. An over voltage protector and an over current protector are used to limit the exposure of high voltages and currents to the MEMS devices and solid-state relays. A relay or equivalent device is energized when a high current is sensed in the loop, which relay is used to protect the MEMS devices and solid state relays from damage. The relay can be controlled via software/hardware and works in conjunction with other components/devices in the overall systems. In this manner, any number of MEMS devices or solid state relays can be protected.Type: ApplicationFiled: February 6, 2002Publication date: July 11, 2002Inventor: Ramon C.W. Chea
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Publication number: 20020021787Abstract: The invention presented herein is directed to a remotely addressable maintenance unit (RAMU) working in conjunction with a test head at the central office for detecting and locating faults in digital subscriber loop (DSL) and/or plain old telephone system (POTS) environments. The RAMU includes circuitry for setting and resetting one or more relays for either normal or testing/maintenance mode. The present invention provides a system and method for addressing the RAMU by applying either positive or negative voltages from the tip to ground, from ring to ground, and from tip and ring to ground. In this manner, individual RAMUs can be defined/designed to respond in certain voltage levels and polarities. Accurate fault detection and sectionalization is achieved by the combination of the addressing capabilities enumerated herein, and the impedance signature designed into the RAMU, working in concert with a test head in the central office.Type: ApplicationFiled: September 27, 2001Publication date: February 21, 2002Applicant: Turnstone Systems, Inc.Inventor: Ramon C.W. Chea