Digital Subscriber Line

Digital Subscriber Line

Abstract

Imagine giving employees immediate, around-the-clock access to all the data they need — the Internet, local area networks (LANs) or wide area networks (WAN) — with no more waiting for dial-up modems to connect, and no more busy signals. Imagine giving them the power to use a single phone line to access data while simultaneously talking on the phone or sending a fax. And imagine doing it without investing in a major system overhaul.
You can do it all with Digital Subscriber Line (DSL) — from BellSouth. DSL service is a new modem technology that transforms a regular copper twisted-pair telephone line into an ultra high-speed conduit for simultaneous voice and data transmissions. Now you can use DSL service to speed up your data communications to and from the Internet, Intranet and corporate network. Tasks that would normally take minutes or longer can now be completed in mere seconds, thanks to BellSouth Business DSL speeds of up to 1.5 Mbps downstream and 256 Kbps upstream for our standard product offering.
DSL uses the existing phone line and in most cases does not require an additional phone line. This gives “always-on” Internet access and does not tie up the phone line. DSL offers users a choice of speeds ranging from 144 Kbps to 1.5Mbps. This is 2.5x to 25x times faster than a standard 56Kbps dial-up modem.
This digital service can be used to deliver bandwidth-intensive applications like streaming audio/video, online games, application programs, telephone calling, video conferencing and other high-bandwidth services.
Today DSL is for the first time putting high-speed Internet access within the reach of the home, small and medium-size businesses. DSL takes existing voice cables that connect customer premises to the phone company’s central office (CO) and turns them into a high-speed digital link.
Over any given line, the maximum DSL speed is determined by the distance between the customer site and the Central Office (CO). Most ISP’s offer Symmetric DSL (SDSL) data services at speeds that vary from 144 Kbps to 1.54 Mbps, and now even faster up to 6.0 Mbps–so customers can choose the rate that meets their specific needs. At the customer premises, a DSL router or modem connects the DSL line to a local-area network (LAN) or an individual computer. Once installed, the DSL router provides the customer site with continuous connection to the Internet and use of the telephone at the same time