Cisco Technology, Inc.

Apple Inc.

Samir Bouadjel

Amrik Singh Bains

Keith Frank Tharp

Clark Carty

William Frank Edwards

Abhilash Rajagopal

Alan Yee

Arvind Kansal

Ken Naumann

Heegon Kim

Kenneth Christian Naumann

Luis R Saavedra

Amrik Bains

Systems for bi-directional single-ended transmission are described. For example, a system may include a receiver with a first differential input terminal and a second differential input terminal, wherein the first differential input terminal is coupled to a first node and the second differential input terminal is coupled to a second node; a transmitter with an output terminal coupled to a third node; a first inductor connected between the first node and the third node; a second inductor connected between the second node and the third node; and a shunt resistor connected between the third node and a ground node.

Bi-directional single-ended transmission systems

Systems for bi-directional single-ended transmission are described. For example, a system may include a receiver with a first differential input terminal and a second differential input terminal, wherein the first differential input terminal is coupled to a first node and the second differential input terminal is coupled to a second node; a transmitter with an output terminal coupled to a third node; a first inductor connected between the first node and the third node; a second inductor connected between the second node and the third node; and a shunt resistor connected between the third node and a ground node. Some implementations include a first inductor with an inductance within twenty percent of 1 microhenry and a capacitance less than a tenth of a picofarad is included in a filter coupling a power supply to transmission line. The first inductor may connect to the transmission line.

Adjustable data rate data communications may be provided. First, a plurality of remote data rates at which a remote device is configured to operate may be received. Then, a plurality of local data rates at which a local device is configured to operate may be received. A greatest one of the plurality of local data rates may comprise a cable data rate comprising a greatest rate supported by a length of cable connecting the local device and the remote device. Next, an operating data rate may be determined. The operating data rate may comprise a highest one of the plurality of local data rates that has a corresponding equivalent within the plurality of remote data rates. The local device may then be operated at the operating data rate.

Adjustable data rates

Various implementations disclosed herein include a power distribution system that provides flexible and/or multi-source supply capacity in response to changes in load power demand relative to active power supply capacity, and based at least in part on a performance objective function. In some implementations, a power distribution system includes a plurality of power supplies, and a power control module connected to control the plurality of power supplies. The power supplies are configured to deliver a current to a power supply node, and are also configured to responsively adjust the current in response to a control command. The power control module provides control commands that are produced in response to threshold changes in load power demand relative to active power supply capacity provided by one or more of the plurality of power supplies, and based at least in part on a performance objective function, such as efficiency, redundancy, and demand tracking.

Power distribution management

Methods and systems are disclosed which can perform cable characterization at link-up and during in-service monitoring to provide the best data throughput. In some embodiments a plurality of frequency tones may be sent across a cable to a remote system. A plurality of return loss values associated with sending the plurality of frequency tones may then be measured and stored. Next, a crosstalk value across the cable may be computed. A quality value for the cable may then be determined based on at least the plurality of return loss values and the crosstalk value.

Ethernet data rate selection based on cable parameters

Power Over Ethernet (POE)/universal power over Ethernet (UPoE) may be enabled at multigigabit port-channel connections. This may allow for additional speed support in auto-negotiation messages while employing multigigabit speeds. An integrated connector module (referred to herein as a 'ICM') compatible with UPoE with a modified local physical layer (PHY) circuit may be capable of supporting multi-gigabit data rates (such as between 1 G to 10 G, e.g., 2.5 G and 5 G) as to not limit the data rates to 1 G. The ICM may provide multi-gig data transmission through a first plurality of pins comprising a multi-gig data pin area. Furthermore, the ICM may provide UPoE power to support the multi-gig transmission through a second plurality of pins comprising a UPoE power pin area.

Growing community of inventors

Los Gatos, CA, United States of America

Samir Bouadjel