Introduction
Overview
Universal Serial Bus (USB) port technology has emerged in response to the increasing number
of external peripheral devices (printers, scanners, modems, digital cameras, removable drives,
etc.) that are increasingly being connected to the latest generation of computers. The USB
behaves in a similar fashion to conventional bus ports (that is, serial, parallel, PS/2
®
); however,
since it does not require any IRQs, more devices can be attached to the system and the problem
of IRQ conflict is eliminated.
Since many older computers don’t have USB connectors onboard and most newer computers
come with only one or two USB ports, USB hubs are used to connect all the USB peripherals
that you may want to use.
The USB 2.0 (4-Port) Hub complies with the USB 2.0 standard. This represents the second USB
generation and provides transfer rates of up to 480 Mbps. It is faster, more efficient, and more
capable than its predecessor, USB 1.1; luckily, it is fully backward compatible, so your prior
investment in USB 1.1 peripherals is not lost.
The USB 2.0 (4-Port) Hub provides one upstream port and four downstream ports. LED indica-
tors display information about the power status of each port. The hub supports high-speed
(480-Mbps), full-speed (12-Mbps), and low-speed (1.5-Mbps) devices, and it can be daisy-
chained to provide as many ports as you require.
When you purchased the USB 2.0 (4-Port) Hub, you should have received:
• The USB 2.0 (4-Port) Hub,
• (1) 3-ft. (0.9-m) USB 2.0 cable,
• A power adapter, and
• This user’s manual.
