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A four-port "long cable" "external box" USB hub A four-port "compact design" USB hub: upstream and downstream ports shown. A USB hub is a device that expands a single Universal Serial Bus (USB) port into several so that there are more ports available to connect devices to a host system, similar to a power strip. All devices connected through a ...
A port expander is a device that allows one port on a computer system to connect to multiple devices. Two basic forms of port expander exist: internal and external. An internal expander has a connection inside the computer, typically on the motherboard, and the only part the user sees is the expansion plate containing multiple ports.
Most laptop computers do not have 12 V power available, and have an eSATAp port which provides only 5 V. Desktop computers, with 12 V available, have a port with two additional pads, placed against the plug's "horns", which provide 12 V. [5] Some manufacturers refer to these ports as eSATApd, where d stands for "dual voltage". Some devices ...
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.
They always need direct cable connection from the computer to the KVM switch to the console [10] and include support for standard category 5 cabling between computers and users interconnected by the extender device. In contrast, USB powered KVM extenders are able to control computer equipment using a combination of USB, keyboard, mouse and ...
A USB-C "travel dock" was released at the same time as Surface Dock 2 with lower power usage and five ports: Ethernet, HDMI, VGA, USB-A and USB-C (charging limited to 12W.) Unlike the Surface Docks, the Travel Hub connects to Surface Devices with USB-C ports including the Surface Pro 7, Surface Book 2, Surface Go, Surface Laptop Go, Surface ...