Specifications

ELAN HOME SYSTEMS COM2 Communications Controller
© ELAN Home Systems 2007 • All rights reserved. 3-13
Digital Subscriber Line (DSL)
Digital Subscriber Line, or DSL, is a batch of technologies that provide a digital connection
(typically an Internet connection) over the copper wires of the local telephone network. DSL
provides high speed Internet access to home consumers in Europe and North America.
Telephone services were initially designed to carry “Plain Old Telephone Service” (POTS) or
Public Switched Telephone Network (PSTN) calls. DSL allows ordinary phone lines to provide
a way to carry data and voice services simultaneously.
DSL Filters
Installers will need to install a passive electronic filter (known variously as a “filter”, “micro-
filter” or a “splitter”) up stream of the COM2 if using the POTS service on the same line. This
ensures that the DSL modem and the telephone only receive the frequencies they are
designed to handle. The end user will need a splitter. The splitter is first thing connected to an
incoming phone line. Then, one side of the splitter goes to the DSL modem. The other side
goes through the filter to the COM2 TELCO input.
Figure 3-17 DSL Filters
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