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How Cyber Trails DSL Works
Call 1-888-841-4DSL (4375) for more information, or
send an email to dslsales@cybertrails.com.
What is DSL?
DSL stands for "Digital Subscriber Line". DSL is a dedicated, always
on (except for 256 Select),
high-speed connection to the Internet. "xDSL utilizes
more of the bandwidth on copper phone lines than what is currently
used for plain old telephone service (POTS). By utilizing
frequencies above the telephone bandwidth (300Hz to 3,200Hz), xDSL
can encode more data to achieve higher data rates than would
otherwise be possible in the restricted frequency range of a POTS
(Plain Old Telephone System) network. In order to utilize the frequencies above the voice audio
spectrum, xDSL equipment must be installed on both ends and the
copper wire in between must be able to sustain the higher
frequencies for the entire route. This means that bandwidth limiting
devices such as loading coils must be removed or
avoided."
(quoted from http://homepage.interaccess.com/~jkristof/xdsl-faq.txt)
Because of the nature of DSL, a customer who would like to use
the service must meet some requirements. To be able to use DSL
service a customer must pass a loop qualification. This loop
qualification tells the phone carrier how far away from the central
office the customer is and whether or not there are digital loops
between the customer and the central office. The speed on the
different types of DSL service is dependent on distance. The closer
to the phone carrier central office the faster your DSL service can
be. If are digital loops between you and the phone carrier's central
office, the only service that you would be able to get is IDSL. Some
other restrictions have to do with load coils and multiplexers on
your phone line.
What are the differences
in DSL types?
ADSL Asymmetric Digital Subscriber Line (ADSL) is the most
popular form of xDSL technology. The key to ADSL is that the
upstream and downstream bandwidth is asymmetric, or uneven. In
practice, the bandwidth from the provider to the user (downstream)
will be the higher speed path. This is in part due to the limitation
of the telephone cabling system and the desire to accommodate the
typical Internet usage pattern where the majority of data is being
sent to the user (programs, graphics, sounds and video) with minimal
upload capacity required (keystrokes and mouse clicks). Downstream
speeds typically range from 256Kbps to 1.5Mbps. Upstream speeds
typically range from 64Kbps to 1Mbps. ADSL also allows the
sharing of a single voice line. With ADSL, and RADSL, you can
talk on the phone and be on the Internet at the same time with only
one phone line. Saves the cost of a second phone line
dedicated for an Internet connection.
RADSL Rate Adaptive Digital Subscriber Line (RADSL) refers to
Qwest ADSL lines that have rated speeds starting at 256Kbps
up and down and goes up to 7.1Mbps down and 1Mbps up. RADSL
also allows the sharing of a single voice line. With RADSL you can talk on the phone and be on the Internet at the
same time with only one phone line. Saves the cost of a second
phone line dedicated for an Internet connection.
IDSL: IDSL service runs over an ISDN line and is currently a data
only connection to the Internet. IDSL has a longer reach than other
flavors of xDSL, so some customers out of reach from ADSL
may still be able to receive IDSL service. IDSL service is
rated at 144Kbps upload and download.
How do I sign up?
To sign-up, you can call our representatives at 1.888.841.4DSL (4375)
Call 1-888-841-4DSL (4375) for more information, or
send an email to dslsales@cybertrails.com.
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