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Frequently Asked Questions

DSL FAQ

What does DSL stand for?
What do I need in order to have DSL access?
How can I have both voice and data over one connection?
What does power-cycling the modem mean?
How far can DSL lines be run?
How can I tell what IP address and subnet mask a computer has?

 

Q. What does DSL stand for?
A. Digital Subscriber Line-- it is an all-digital connection between the user and the telephone company using existing copper telephone lines.

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Q. What do I need in order to have DSL access?
A. You just need a DSL capable phone line from your local phone company. You will also need an ethernet card to connect your DSL modem to your computer.

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Q. How can I have both voice and data over one connection?
A. DSL uses a portion of the phone line that regular phone service doesn't use. If you have DSL installed, you will be given small filters to attach to the outlets that don't provide the signal to your ADSL modem. These filters are low-pass filters -- simple filters that block all signals above a certain frequency. Since all voice conversations take place below 4 KHz, the low-pass (LP) filters are built to block everything above 4 KHz, preventing the data signals from interfering with standard telephone calls.

courtesy www.howstuffworks.com

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Q. What does power-cycling the modem mean?
A. Power-cycling the modem is just turning it off or unpluging it from power for 15 to 45 seconds and then turning it back on.

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Q. How far can DSL lines be run?
A. ADSL is a distance-sensitive technology: As the connection's length increases, the signal quality decreases and the connection speed goes down. The limit for ADSL service is 18,000 feet (5,460 meters), though for speed and quality of service reasons many ADSL providers place a lower limit on the distances for the service. At the extremes of the distance limits, ADSL customers may see speeds far below the promised maximums, while customers nearer the central office have faster connections and may see extremely high speeds in the future. ADSL technology can provide maximum downstream (Internet to customer) speeds of up to 8 megabits per second (Mbps) at a distance of about 6,000 feet (1,820 meters), and upstream speeds of up to 768 kilobits per second (Kbps). In practice, the best speeds widely offered today are 1.5 Mbps downstream, with upstream speeds varying between 64 and 768 Kbps.

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Q. How can I tell what IP address and subnet mask a computer has?
A. The following will only work in Windows operating systems:

Windows 9X: Click Start --> Run --> type winipcfg and click OK.

Windows NT: Click Start --> Run --> type ipconfig and click OK.

Windows 2000: Click Start --> Run --> type command and click OK. Type ipconfig and hit enter.

Windows XP: Click Start --> Run --> type command and click OK. Type ipconfig and hit enter.

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Source: http://www.howstuffworks.com

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