Generic 4 Port USB Hub - Part 2

Features & Specifications
Here’s the boring information as stated on the box:

Features

  1. 4 USB Port up to 500mA per port
  2. Self-powered mode and bus-powered mode auto-detection
  3. Excess current protection on each port
  4. Power LEDs to indicate self-powered mode or bus-powered mode
  5. Support both full-speed and low-speed transfer rate
  6. Chains up to 127 USB devices
  7. Plug-&-Play system configuration
  8. USB and ACPI compliant

Specifications

  1. Interface standard: USB v1.1
  2. USB connectors: 4 Type A connectors and 1 Type B connector
  3. Data transfer rate: Full speed at 12Mb/s and Low-Speed at 1.5Mb/s
  4. Activity LED: 4 LEDs, 1 per USB downstream port
  5. Power LED: 2 LEDs, 1 for self-powered mode (500mA per port), 1 for bus-powered mode (100mA per port)
  6. Power adapter: 120V AC input, 2.5 [email protected] 6V output
  7. Cable: 1.8 metres USB cable

It is good to note that this is a self-powered hub with its own AC adapter. The advantage of this is that the hub will be able to provide a full 500mA per port. This is necessary to provide sufficient power to USB devices who do not have their own power brick. Here’s why:

A single USB channel on your PC provides a total of 500mA. So when a hub is used, multiple devices will share this amperage amongst themselves. Sometimes this becomes insufficient. USB scanners (like my 4200C) usually come with their own AC adapter, so it is usually power hungry devices like video-conferencing webcams that becomes a problem. More on this later…

 

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