Steven E Chow, 58802 Shallowater Dr, Allen, TX 75013

6606306, Aug 12, 2003

Dec 15, 1999

09/465235

Tien-Yi Lin - Fremont CA
Steven Chow - San Carlos CA
Joseph C. Harrow - San Ramon CA
Ken J. Ju - Cupertino CA
Son H. P. Le - Cupertino CA

Cisco Technology, Inc. - San Jose CA

H04L 1216

370261, 370259, 379202, 379201, 348 15

A device for supporting a plurality of media conferences includes digital signal processors (DSPs) and a system resource management (SRM) module coupled to the DSPs. Each DSP receives input data packets from conference participants and processes the input data packets to generate output data packets. Each DSP determines whether the media conference is set to an active mode and communicates the output data packets to the conference participants in response to determining that the media conference is set to the active mode. The SRM module allocates a media conference to a first DSP and a second DSP and sets the media conference to the active mode in the first DSP and a stand-by mode in the second DSP. The first DSP communicates output data packets associated with the media conference in response to the SRM module setting the media conference to the active mode in the first DSP. The SRM module sets the media conference to the active mode in the second DSP and de-allocates the media conference from the first DSP, and the second DSP communicates output data packets associated with the media conference in response to the SRM module setting the media conference to the active mode in the second DSP.

6650696, Nov 18, 2003

Dec 15, 1999

09/465234

Tien-Yi Lin - Fremont CA
Steven Chow - San Carlos CA

Cisco Technology, Inc. - San Jose CA

H04L 522

375219, 370365

A system for communicating data among digital signal processors (DSPs) includes DSPs and a shift register. Each DSP includes a transmit node that communicates data and a receive node that receives data. The shift register includes an input node coupled to the transmit node of each DSP and an output node coupled to the receive node of each DSP. The input node receives data from the transmit node of each DSP, and the output node communicates the data received at the input node to the receive node of each DSP.

6744741, Jun 1, 2004

Dec 15, 1999

09/464069

Ken J. Ju - Cupertino CA
Tien-Yi Lin - Fremont CA
Steven Chow - San Carlos CA
Joseph C. Harrow - San Ramon CA
Son H. P. Le - Cupertino CA

Cisco Technology, Inc. - San Jose CA

H04L 1216

370260, 370264

A system for maintaining a plurality of media conferences includes digital signal processors (DSPs) and a system resource management (SRM) module coupled to the DSPs. Each DSP receives input data packets from conference participants, processes the input data packets to generate output data packets, and communicates the output data packets to the conference participants. The SRM module may migrate a media conference from a first DSP to a second DSP.

6813340, Nov 2, 2004

Nov 28, 2000

09/723678

Michael Issaa - Campbell CA
Steven Chow - San Carlos CA

Cisco Technology, Inc. - San Jose CA

H04M 124

379 31, 379 22, 379 2203, 379 24, 379 2701, 379377, 37939501, 37939901, 379413, 37941301

A line card or other telephone or communications interface provided with a ringing SLIC outputs relatively high voltage, such as in excess of about 90 volts, and/or relatively high current such as in excess of about 20 milliamps during normal use, but decreases the voltage or current of a ringing signal or other signal upon occurrence of a tip and/or ring line fault or other abnormal condition. The abnormal condition is detected by measuring voltage and/or current on the tip line and/or ring line. In response to an excess voltage or current, the ringing current or other output current is reduced to achieve desired safety and/or compliance with standards.

6829336, Dec 7, 2004

May 30, 2000

09/580798

Michael A. Issaa - San Bruno CA
Steven Chow - San Carlos CA

Cisco Technology, Inc. - San Jose CA

H04M 1106

379 9305, 370488

A filtering device ( ) for active filtering at a customer premises includes an input interface that receives telephone signals and digital data signals communicated from a central office ( ) using a telephone line ( ). The filtering device ( ) further includes an active low-pass filter ( ) that receives the telephone signals, the digital data signals, and electrical power from a power source. The active low-pass filter ( ) attenuates the digital data signals and passes the telephone signals using the electrical power. The filtering device ( ) also includes an output interface that receives the telephone signals from the active low-pass filter ( ) and communicates the telephone signals to a telephone ( ).

6876678, Apr 5, 2005

Feb 4, 1999

09/244361

Steven Chow - San Carlos CA, US
Jicheng Ye - Cupertino CA, US
Wen Huang - Cupertino CA, US

Cisco Technology, Inc. - San Jose CA

H04J003/02
H04L012/66

370538, 370463, 370493

A Serial Communications Controller (SCC) is configured to provide TDM multiplexing of signals regardless of whether such signals are synchronous or asynchronous signals. When an asynchronous signal is detected, the data rate of the asynchronous signal is automatically measured. The two data streams are buffered, e. g. , by FIFOs. Data is clocked-out from the FIFOs into periods of a TDM signal which has a period at least twice that of the faster of the two input signals. In one embodiment alternate periods of the TDM signal are used for the first and second input signals. Bits from the slower of the two input signals are repeated a sufficient number of times, in the TDM signal, that ratio of the rate at which new data bits from the second signal are placed into the TDM signal, to the rate of output of bits from the first stream onto the TDM signal equals (on average) the ratio of the data rates of the first and second input streams. When the ratio of the data rates of the input streams is non-integral, the number of times the bits from the second or slower data stream are repeated, is dithered to keep accumulated skew of data rates in the TDM signal less than a predetermined threshold, such as the duration of a TDM period.

7039180, May 2, 2006

Dec 20, 2000

09/741950

Michael A. Issaa - Campbell CA, US
Steven Chow - San Carlos CA, US

Cisco Technology, Inc. - San Jose CA

H04M 1/00
H04M 9/00

37939901, 379 9331, 379403, 37941302, 37941303, 37941304

A method and apparatus for enabling multiple protocol communication over a network are disclosed. A first circuit communicates first signals in a first frequency band using a first data protocol and attenuates second signals in a second frequency band using a second data protocol. The first data protocol supports a first modulation technique and a second modulation technique. A second circuit communicates the second signals in the second frequency band using the second data protocol.

2007028, Dec 6, 2007

Jun 1, 2007

11/757347

Jimmy Clidaras - Los Altos CA, US
William Hamburgen - Palo Alto CA, US
Andrew Carlson - Atherton CA, US
Steven Y. Chow - Foster City CA, US
Winnie Leung - Mountain View CA, US
Montgomery Sykora - Denver CO, US
Donald L. Beaty - Red Bank NJ, US

H04B 1/034

455128, 4555751

A system can include an enclosure having an exterior surface and an interior region that is characterized by a width and a length that is longer than the width; a plurality of trays mounted in racks that line a majority of each side of the length of the interior region and that define an aisle therebetween which is suitable for passage by one or more human occupants; cooling coils configured to capture heat generated by the plurality of trays and exhaust the heat outside the interior region; a plurality of connections on the exterior surface for supplying electrical power to the plurality of trays, supplying cooling fluid to the cooling coils, and for receiving cooling fluid discharged from the cooling coils; and doors at either end of the aisle configured and positioned to facilitate emergency egress from the enclosure by a human occupant.