ZyXEL Communications P630M, User Manual

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Prestige 630 ADSL USB Modem
x What is ADSL?
What is ADSL?
Your Prestige 630 ADSL USB Modem
Congratulations on the purchase of your new modem! Your modem combines the super-fast speed of state-
of-the-art ADSL (Asynchronous Digital Subscriber Line) technology with the ease of setup and operation
facilitated by a Plug and Play USB (Universal Serial Bus) interface.
About ADSL
Asymmetric Digital Subscriber Line (ADSL) technology provides high-speed data access across regular
phone lines (copper wires) by making use of previously unused frequency bandwidth above the voice band.
By placing the ADSL signal above the frequency of voice signals, ADSL service is able to coexist on the
same line with your telephone service. ADSL is asymmetric in the sense that it provides a higher downstream
data rate transfer (receive) than in the upstream (transmit) transfer. Asymmetric operation is ideal for typical
home and small office use where files and information are downloaded more frequently than uploaded.
Advantages of ADSL
1. ADSL transforms plain old telephone lines into a high-speed conduit for data, information,
entertainment and more while simultaneously allowing you to use your telephone - this provides
enormous advantages at home and at work.
2. ADSL provides affordable high-speed remote access to the Internet, corporate networks and on-line
services over ordinary phone lines.
!
Nearly 300 times faster than 24.4 Kbps modems.
!
Over 100 times faster than 56 Kbps modems.
!
70 times faster than 128 Kbps ISDN.
3. ADSL enables the use of real-time, interactive multimedia and broadcast-quality video for services such
as collaborative computing, video conferencing, distance learning and video-on-demand.
4.
ADSL provides a private (unlike cable telephone and modem services where the line is shared),
dedicated and secure channel of communications between you and your service provider.
5.
Because your line is dedicated (not shared), transmission speeds are not affected by other users. With
cable modems, transmission speeds drop significantly as more users go on-line because the line is
shared.
6. ADSL is "always on" (connected) - just like your telephone. This means that there is no time wasted
dialing up the service several times a day and waiting to be connected; ADSL is on standby, ready for
use whenever you need it.