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high-speed internet DSL, Cable
Internet, and Satellite Internet
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included-Satellite TV, Internet and Internet phone bundle.
DSL is a technology that provides
digital data transmission over the wires of a local telephone network.
DSL can be used at the same time and on the same phone line with a
regular telephone, for it uses high frequency, while regular telephone
uses a lower frequency
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Common DSL Terms and
Access Method - A technology used to access the Internet (dial-up,
ISDN, cable modem or DSL).
ADSL - Asymmetric Digital Subscriber Line. Usually meant for home
usage, this DSL service has a faster download speed and a slower upload speed. Download
speeds may range from 256 Kbps to 7 Mbps.
Broadband - Digital technologies that offer consumers a single way
to access voice, high-speed data services, video services, and interactive information
Bandwidth - How much information you can send through a
connection. Usually measured in bits-per-second (bps), kilobytes-per-second (Kbps), or
megabytes-per-second (Mbps). A full page of English text is about 16,000 bits. A fast
modem can move about 15,000 bits in one second
CLEC - A CLEC (Competitive Local Exchange Carrier) is a telephone
company that competes with an Incumbent Local Exchange Carrier (ILEC) such as a Regional
Bell Operating Company (RBOC), GTE, ALLNET, etc. With the passage of the
Telecommunications Act of 1996, there has been an explosion in the number of CLECs. The
Act allows companies with CLEC status to use ILEC infrastructure.
Central Office - Belonging to your local phone provider, this is
the building that houses the phone equipment for your area, such as switches. DSL lines
run from the customer's home to this office. It is the distance from this office that
determines whether or not you can get DSL service in your home, and what speeds you
qualify for. Usually, if you are within about 18,000 feet from the central office, you
are able to get some form of DSL service.
Dedicated Line - A communications circuit or channel for the
exclusive use of a particular subscriber. For example, dedicated lines are used for
computers when large amounts of data need to be moved between two points.
DirecPC - Internet access that uses a satellite dish to receive
data users request over the Internet. Outbound information (such as a URL request) is
requested in the traditional way, usually via a dial-up connection.
DSL - A method for moving data over regular phone lines. A
DSL circuit is much faster than a regular phone connection, and the wires coming
into the subscriber's premises are the same (copper) wires used for regular phone
service. A DSL circuit must be configured to connect two specific locations, similar to a
leased line. However, DSL uses previously unused frequencies of the line so that a user
may connect to the Internet and talk on the phone at the same time.
Ethernet - A very common method of networking computers in a LAN.
Ethernet will handle about 10,000,000 bits-per-second and can be used with almost any
kind of computer.
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Fire Wall - A combination of hardware and software that separates
a LAN into two or more parts for security purposes. Often used to separate an in-house
LAN from the Internet.
G. Lite - A cheap DSL service that offers a download speed that is
slower than other forms (maximum of 1.5 Mbps). But, it is an ITU (International
Telecommunications Union) standard, which means that DSL may soon be available from many
vendors and may operate interchangeably. This may eliminate the need for multiple
installation visits from providers.
HDSL - High bit-rate Digital Subscriber Line that delivers T1
speeds. This requires two lines at present.
IDSL - DSL transferred at 128Kbps on regular copper lines. This
uses ISDN transmission coding, but no form of dial-up.
IP Address - Every machine that is on the Internet has a unique IP
number - if a machine does not have an IP number, it is not really on the Internet. Most
machines also have one or more Domain Names that are easier for people to remember.
ISP - Internet service provider. Where you get your Internet
LAN - A LAN (Local Area Network) is a computer network that spans
a relatively small area. Most LANs are confined to a single building, connecting two or
more computers. Each individual computer in a LAN has its own CPU with which it executes
programs, but it is also able to access data and devices anywhere on the LAN. This means
that many users can share expensive devices, such as laser printers, as well as
communicate with each other, by sending e-mail or engaging in chat sessions. LANs are
capable of transmitting data at very fast rates, much faster than data can be transmitted
over a telephone line. Because the distances are limited, there is a limit on the number
of computers that can be attached to a single LAN.
Modem - Modulator-demodulator. A device that converts digital
signals into analog signals and enables computers to receive data over telephone
NIC Card - Network Interface Card. It plugs into a computer and
adapts the network interface to the appropriate standard. ISA, PCI and PCMCIA cards are
all examples of NICs.
PPP - Most well known as a protocol that allows a computer to use
a regular telephone line and a modem to make TCP/IP connections and thus be truly on the
RADSL - Rate Adaptive Digital Subscriber Line. A version of ADSL
where modems test the line at start-up and adapt their operating speed to the capacity of
Router - This is your connection between networks for DSL service.
It keeps packets flowing from everywhere, directing traffic according to programmed
SDSL - Single Line DSL. Requires just one twisted line compared to
other forms of DSL that might need two or three. It is also symmetric, which means that
the maximum upstream and downstream speeds are the same.
SMTP - Simple Mail Transfer Protocol. The main protocol used to
send electronic mail on the Internet.
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