JSI Tip 1882. What is an ADSL line?


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ADSL ( Asymmetric Digital Subscriber Line) is a modem technology that uses an ordinary twisted copper pair phone line and turns it into a high-speed digital line.

Voice, analog modem, and fax communications operates at 4KHZ frequencies, or lower. ADSL uses frequencies above this range, providing:

- Simultaneous Internet and voice/fax capabilities over a single telephone line.

- High-speed Internet access that's always on-line.

- A cost-effective solution for residential customers, telecommuters and small businesses.

ADSL allows for speeds up to 8 Mbps downstream and up to 1 Mbps upstream, depending upon line length, loop, and line conditions. Most implemtations are slower.

My new service is implemented by installing a fast PCI NIC in my server, connected to an ADSL external modem, which is connected to the same phone line as my fax, 28.8 modem, and an extra telephone hand set.

Configuration is via Control Panel / Network / Protocols / TCP/IP and uses the standard DHCP client to get an IP address from my provider's server(s).

When I install Proxy server, I will provide access to the entire LAN.

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