What is ADSL?
Asymmetric Digital Subscriber Line, a type of Digital Subscriber Line, providing high-speed digital modem technology via a single telephone line.
Why is ADSL called asymmetric?
The downstream data transmission speed (Internet to home) is higher because users typically download significantly more information then they upload.
Does DSL require installing an additional phone line?
No. ADSL technology utilizes varying frequency spectrums, 0-4 kHz for POTS (Plain Old Telephone Service) and 100 kHz - 2.2Mhz for data transmission. This provides for simultaneous analog voice or fax and DSL data transmission over the same telephone line. You still use your phone as you do now. Think of the DSL as an added feature.
If my DSL modem fails or loses power, do I lose phone service?
No. ADSL modem is designed so that your normal telephone service will operate even if the modem is unplugged or otherwise disabled.
How does DSL compare to cable modems?
Cable modems offer service over a shared cable. Tens and possibly hundreds, of users may be connected to this local cable line. Access speed is compromised as more users access a cable data network. The capacity available to any one user inevitably drops. The DSL technology provides a dedicated service over an existing telephone line. DSL provides dedicated service ensuring that you don't have to share your access connection with other users.
