公开(公告)号：US20200041579A1

公开(公告)日：2020-02-06

申请号：US16600361

申请日：2019-10-11

Applicant: Cisco Technology, Inc.

Inventor： Xiqun Zhu ,  Sung Kee Baek ,  Robert Gregory Twiss

IPC: G01R31/42 ,  G01R31/02 ,  G01R19/165 ,  H02J3/00 ,  H02J13/00

Abstract: To reduce the rate at which a false alternating current (“AC”) loss alarming signal is generated, but at the same time detect an actual AC loss situation in a timely manner, the disclosed method describes an AC line power loss detection and active verification method. If the AC line input voltage dips momentarily lower than a standard sine wave amplitude, the AC line may not be considered lost as long as it still has energy to drive a load. The method inserts a momentary load across the AC line and compares the AC line voltage before and after the extra load is applied. If the AC power is present, this extra loading will increase the AC loading current momentarily, but will not affect the AC line voltage. However, if the AC power is lost, such loading will lower the AC line voltage, indicating a loss of power.

公开(公告)号：US20190281725A1

公开(公告)日：2019-09-12

申请号：US15918972

申请日：2018-03-12

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Charles Calvin Byers ,  Joel Richard Goergen ,  D. Brice Achkir ,  Robert Gregory Twiss

IPC: H05K7/20 ,  F25D17/08 ,  H04W40/24 ,  G06F1/18 ,  G06F1/20

Abstract: In one embodiment, a method includes delivering power, data, and cooling on a cable from a central network device to a splitter device for splitting and transmitting the power, data, and cooling to a plurality of remote communications devices over a plurality of cables, each of the cables carrying the power, data, and cooling, receiving at the central network device, monitoring information from the remote communications devices on the cable, processing the monitoring information, and allocating the power, data, and cooling to each of the remote communications devices based on the monitoring information. A system is also disclosed herein.

公开(公告)号：US20190272011A1

公开(公告)日：2019-09-05

申请号：US15910203

申请日：2018-03-02

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Joel Richard Goergen ,  Charles Calvin Byers ,  Robert Gregory Twiss ,  D. Brice Achkir

IPC: G06F1/26 ,  H04L12/10 ,  G06F1/20 ,  G06N99/00

Abstract: In one embodiment, a method includes delivering power, data, and cooling from a central network device to a plurality of remote communications devices over cables connecting the central network device to the remote communications devices, each of the cables carrying said power, data, and cooling, and receiving at the central network device, power and thermal data from the remote communications devices based on monitoring of power and cooling at the remote communications devices. The remote communications devices are powered by the power and cooled by the cooling delivered from the central network device. An apparatus is also disclosed herein.

公开(公告)号：US10109558B2

公开(公告)日：2018-10-23

申请号：US14740898

申请日：2015-06-16

Applicant: Cisco Technology, Inc.

Inventor： Vic Chia ,  Hong Huynh ,  Steven A. Hanssen ,  Robert Gregory Twiss

IPC: H01L23/40 ,  F16B5/02

Abstract: A heat sink mounting configuration is provided that is configured to prevent the heat sink from damaging ball grid arrays (BGA) of an application specific integrated circuit (ASIC) mounted on a printed circuit board (PCB) when the line card is subjected to vibrations and shocks. The heat sink mounting configuration may include a set of screws configured to be at least partially disposed within the apertures of the heat sink to secure the heat sink to the PCB. The mounting configuration includes a resilient member and a spacer disposed around the screws proximate to the apertures. The resilient members are configured to bias the heat sink against the ASIC to maintain the heat sink in contact with the ASIC. The spacers are configured to prevent the heat sink from impacting the ASIC with forces large enough to damage the BGA when the line card is subjected to vibrations and shocks.