Subject: [NEXTEL-1] Digital 800-megahertz system can do things older radio systems can't

From: [email-masked]
Date: Tue, 10 Feb 2004 02:02:56 -0500

The Tennessean, TN - Jan 19, 2004

Digital 800-megahertz system can do things older radio systems can't

The 800-megahertz trunk radio system,
which is used by Nashville's police, fire
and rescue personnel, is used by many
larger cities because it can reach a wider
coverage area and can handle more
users than analog technology, said
RoxAnn Brown, director of the Metro Nashville Emergency Communication Center.
It also has multiple channels to allow for
different ''talk groups'' in which
communication can be divided between
different areas and different emergency
management and service agencies, such
as having separate talk groups for
firefighters and water system
employees.

The 800-megahertz system has other advantages. A person using the 800-megahertz
system can simply push the button on his or her radio and talk without waiting
for all the other users to stop talking; the technology hunts for an open
channel and broadcasts the message. That helps police officers or firefighters
pass important information quickly to co-workers.

Mt. Juliet uses an analog VHF frequency that utilizes a repeater to listen for
weak signals and re-transmits them at a higher power. A conventional VHF system
can't have multiple talk groups and expansion is much more limited.
— Andy Humbles

Related story: Police will get on same wavelength

 http://www.tennessean.com/government/archives/04/01/45710679.shtml?Element_ID=45710679

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