For All Installations
Glossary of Terms
The Webopedia Computer Dictionary (http://www.webopedia.com) and
Wikipedia (http://www.wikipedia.org/) are useful resources for more
information about the Internet, VoIP and related topics.
ADSL
Asymmetric Digital Subscriber Line, a technology that is growing in popularity
as more areas around the world gain access. ADSL allows increased data rates
over existing copper telephone lines (POTS), supporting data rates of from 1.5
to 9 Mbps when receiving data (known as the downstream rate) and from 16 to
640 Kbps when sending data (known as the upstream rate). ADSL requires a
special modem.
Broadband
A broadband connection is a type of data transmission in which a single medium
(wire) can carry several channels at once. Another word for high-speed access to
the Internet.
CA38A
A surface or wall mounted telephone jack, containing simple screw terminals
USOC color-coded for compatibility with standard telephone systems. The
CA38A is installed in the line between the CO and the house phones, allowing a
security system to have separate connections to the inside phones and the CO
line. Identified in the United States as RJ31X.
Cable Modem
Modem for high-speed Internet access over a cable TV connection. Central
Station Also known as a “Monitoring Centre.” A common term used to refer to a
company that provides services to monitor burglar, fire and residential alarm
systems. The central-station may also provide watchman and supervisory
services. Central-stations use special telephone lines, computers and trained staff
to monitor their customers’ security systems and call the appropriate authorities
in the event an alarm signal is received. The ability of the alarm panel to
communicate back to the Central Station is crucial to the concept of monitoring.
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