ZyXEL Communications P630M User Manual

Prestige 630 ADSL USB Modem

What is USB?

USB (Universal Serial Bus) is an external interface data communication standard for a peripheral bus that
was developed by Intel



and Microsoft



. USB is commonly referred to as a Plug and Play - meaning that

your computer will instantly recognize (auto-detect) your new device (your Prestige). Plug and Play means
that you require no technical expertise to install your device, installation times are greatly reduced and that
you simply plug your USB cable in and follow a limited set of easy-to-understand automatically generated
instructions. Set-up and operation has never been easier.

Advantages of USB

1. Replaces the need for a plethora of connectors and ports on computers and provides an interface for

computer-telephony devices. Instead of having separate connections for keyboard, mouse, printer,
modem, joystick, audio devices, CD-ROMs, digital cameras and other devices, USB provides a single
port to connect all of the devices (via hub).

2. USB eliminates many of the problems associated with (physically) opening your computer to install

adapter cards, change dip switches and configure IRQs (Interrupt Requests).

3. USB defines the ports and the bus topology with data transfer rates up to 12 Mbps. A single cable up to

5 meters in length is used to daisy-chain devices to a single port. Up to 63 devices can be added to the
port at any time without rebooting your computer (via hub).

4. USB supplies power to some devices - eliminating the need for power cords or batteries.