DSL is a direct dedicated connection to the Internet, unlike cable or dial-up connections,
which are shared access. DSL provides your own personal connection which
is not compromised by multiple users sharing the same equipment. DSL (Digital
Subscriber Line) is a modem technology which converts your telephone line
into a high-speed connection to the Internet. It's 'always on' and allows
you to access the Internet and talk on the phone or send faxes at the same
time, without the need to install additional phone lines.
ADSL (Asymmetric Digital Subscriber
Line) lets you use the same ordinary copper phone line for both your phone
service and high-speed Internet connection. In other words, you can surf
the Web and talk on the phone at the same time. This is accomplished by
sending the DSL signal over the line at a higher frequency than is used
by voice. The DSL is asymmetric in that download speeds can be up to 7
times faster than upload speeds. SDSL(Symmetric Digital Subscriber Line):
SDSL is a symmetric service - the upstream speed is the same as the downstream
speed. This service is delivered via a single copper pair and is ideal
for business applications that would have otherwise been served by an
expensive T1.
A DSL modem on your phone
line splits your single phone line into two frequencies: one for data
and one for voice. This allows you to make and receive phone calls without
interrupting the Internet connection.
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