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Prestige 630-C Series ADSL USB Modem
About ADSL xiii
About ADSL
ADSL Overview
Asynchronous Digital Subscriber Line (ADSL) technology provides high-speed data access across regular
telephone or ISDN lines by making use of previously unused high-frequency bandwidth. ADSL is
asymmetric in the sense that it provides a higher downstream data rate transfer (up to 8Mbps), than in the
upstream transfer (up to 832 Kbps). 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 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.
2. 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.
3. ADSL is "always on" (connected). 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.