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In Commercial Confidence Introduction
ADSL USB Modem - User Manual Page 1 - 1
FTEL Issue 02 March 02
CHAPTER 1 Introduction
This chapter provides a brief overview of the ADSL USB modem. Specifically this chapter
describes:
• What is ADSL
• Protocol and device drivers
• features summary
What is ADSL?
Asymmetric Digital Subscriber Line (ADSL) technology provides high-speed data access across a
telephone line (copper-twisted pair) by making use of previously unused frequency bandwidth
above the voice frequency band. By placing the ADSL signal above the frequency of the voice
signal, ADSL service is able to coexist on the same line with your telephone service. ADSL is
asymmetric because it provides a higher data rate in the downstream (internet provider to your
computer) direction than in the upstream (computer to internet) direction. Asymmetric operation is
ideal for home and small office use where files and information are downloaded to the computer
more frequently than uploaded.
Protocol and Device Driver Selection
The ADSL USB (Universal Serial Bus) Modem can be easily connected to a USB port on a
computer via a standard USB cable. The ADSL USB Modem is fully software upgradeable so that
new features and updates may be added by simply loading a new version of the device driver onto
your Personal Computer (PC).