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  2. USB - Wikipedia

    en.wikipedia.org/wiki/USB

    Standard USB hub ports can provide from the typical 500 mA/2.5 W of current, only 100 mA from non-hub ports. USB 3.0 and USB On-The-Go supply 1.8 A/9.0 W (for dedicated battery charging, 1.5 A/7.5 W full bandwidth or 900 mA/4.5 W high bandwidth), while FireWire can in theory supply up to 60 watts of power, although 10 to 20 watts is more typical.

  3. USB communications - Wikipedia

    en.wikipedia.org/wiki/USB_communications

    The half-duplex lines are still used for configuration. SuperSpeed+ (SS+) uses increased signaling rate (Gen 2×1 mode) and/or the additional lane in the Type-C connector (Gen 1×2 and Gen 2×2 mode). A USB connection is always between a host or hub at the A connector end, and a device or hub's upstream port at the other end.

  4. USB hardware - Wikipedia

    en.wikipedia.org/wiki/USB_hardware

    ACAs have three ports: the OTG port for the portable device, which is required to have a Micro-A plug on a captive cable; the accessory port, which is required to have a Micro-AB or type-A receptacle; and the charging port, which is required to have a Micro-B receptacle, or type-A plug or charger on a captive cable.

  5. USB4 - Wikipedia

    en.wikipedia.org/wiki/USB4

    Downstream facing ports includes host ports as well as any "outputs" of a USB4 hub. While upstream facing ports include anything that is connectible to a downstream facing port, like the ports of peripherals or the "input" port of a USB4 hub. [21] Any USB4 DFP port is required to also implement USB 2.0, USB 3.2 and DP Alternative Mode support ...

  6. Duplex (telecommunications) - Wikipedia

    en.wikipedia.org/wiki/Duplex_(telecommunications)

    A duplex communication system is a point-to-point system composed of two or more connected parties or devices that can communicate with one another in both directions. Duplex systems are employed in many communications networks, either to allow for simultaneous communication in both directions between two connected parties or to provide a reverse path for the monitoring and remote adjustment ...

  7. History of AC power plugs and sockets - Wikipedia

    en.wikipedia.org/wiki/History_of_AC_power_plugs...

    Obsolete 125 V, 15 A / 250 V, 10 A duplex outlet. A patent for the obsolete "wye" American plug and socket was filed in 1915 under U.S. patent 1,179,728. [21] It predated the NEMA sockets and plugs. The plugs and sockets used in countries such as Argentina, Australia and China are based on this type and are physically compatible.

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