Glossary 131
FCC Federal Communications Commission, an
independent United States government
agency that regulates interstate and
international radio communications.
L
LED Light Emitting Diode, a device that is able to
emit light.
M
mute A mute controls the circumstances under
which a received signal is passed to the
radio’s speaker. For example, when a signal is
received by the radio, the mute may remain
‘closed’ if the signal is not strong enough,
does not have valid signaling or is encrypted.
P
P25 Project 25. The Association of Public Safety
Communications Officials (APCO) established
Project 25 (P25). This project was led by
United States Federal, state, and local
government representatives to develop
standards for interoperable digital radios and
systems to meet the needs of public safety
users. See
http://www.project25.org for
further information.
R
repeater A repeater is a relaying site, usually situated
above a city or town. The repeater extends
the range of radio communications by
receiving and re-transmitting signals received
from radios.
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