140 Glossary TB9300 Installation and Operation Manual
© Tait International Limited April 2024
CTCSS
CTCSS (continuous tone controlled squelch system), also known as PL
(private line), is a type of signaling that uses subaudible tones to segregate
groups of users.
CWID Continuous Wave Identification is a method of automatically identifying
the base station using a Morse code. Continuous wave means transmission
of a signal with a single frequency that is either on or off, as opposed to a
modulated carrier.
dispatcher A person who gives official instructions by radio to one or more mobile
stations.
DMR Digital Mobile Radio. A set of standards and requirements endorsed by
ETSI and intended for professional mobile radio (PMR) users.
duplex Providing transmission and reception in both directions simultaneously.
duty cycle Used in relation to the PA, it is the proportion of time (expressed as a
percentage) during which the PA is transmitting.
EIA Electronic Industries Alliance. Accredited by the American National
Standards Institute (ANSI) and responsible for developing
telecommunications and electronics standards in the USA.
ETSI European Telecommunications Standards Institute. The non-profit
organization responsible for producing European telecommunications
standards.
fallback mode An operational mode of Tait DMR and MPT trunked networks. It comes
into effect when the base station loses communication with the trunking
node controller. In fallback, one base station operates a control channel and
allocates calls to the other traffic channels at the site. The base station in
fallback mode will accept all registrations without requiring authorisation.
FCC Federal Communications Commission. The FCC is an independent United
States government agency that regulates interstate and international radio
communications.
feature set A function or mode of operation of the base station which can be enabled
or disabled using the WebUI. Each feature set requires a license to be
purchased from Tait before it can be enabled.
feature license key The unique set of digits belonging to a license which is programmed into
the base station to enable a feature set.
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