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2. USB hub - Wikipedia

   en.wikipedia.org/wiki/USB_hub

   Power equals voltage times current. A USB port that draws 500 mA (0.5 A) at 5 volts is drawing 2.5 watts of power. In Bus-powered USB hubs, each USB port can supply power as well as transfer data. A self-powered hub takes its power from an external power supply unit and can therefore provide full power (up to 500 mA) to every port. Self-powered ...

3. Port expander - Wikipedia

   en.wikipedia.org/wiki/Port_expander

   They go by several names, such as "switch", "hub" or "splitter", but they all do the same thing. Manufacturers have produced expanders for nearly every type of port, [ citation needed ] but the most common household versions connect to universal serial bus ( USB ) or to Ethernet ports.

4. PoweredUSB - Wikipedia

   en.wikipedia.org/wiki/PoweredUSB

   12 V and 24 V powered USB sockets, on an NCR cash register. PoweredUSB, also known as Retail USB, USB PlusPower, USB +Power, and USB Power Plus, [1] is an addition to the Universal Serial Bus standard that allows for higher-power devices to obtain power through their USB host instead of requiring an independent power supply or external AC adapter.

5. USB hardware - Wikipedia

   en.wikipedia.org/wiki/USB_hardware

   To allow for voltage drops, the voltage at the host port, hub port, and device are specified to be at least 4.75 V, 4.4 V, and 4.35 V respectively by USB 2.0 for low-power devices, [a] but must be at least 4.75 V at all locations for high-power [b] devices (however, high-power devices are required to operate as a low-powered device so that they ...

6. USB On-The-Go - Wikipedia

   en.wikipedia.org/wiki/USB_On-The-Go

   The USB OTG and Embedded Host Supplement to the USB 2.0 specification introduced three new communication protocols: . Attach Detection Protocol (ADP): Allows an OTG device, embedded host or USB device to determine attachment status in the absence of power on the USB bus, enabling both insertion-based behavior and the capability to display attachment status.

7. ATEN International - Wikipedia

   en.wikipedia.org/wiki/ATEN_International

   In 2000, the company developed the first 4-port USB 2.0 hub, which became a USB testing standard for the USB Implementers Forum, Inc. [5] The company went public in 2003 and has since remained the only listed KVM manufacturer in the world. [6]