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Continuous Assignment The ability of the Motorola Trunked system to ensure that a radio just
coming into service will be sent to the appropriate voice channel to
join the rest of the Fleet, Subfleet or Talkgroup. Once a group has been
assigned a voice channel, the control channel will continue to
transmit the voice channel information for that call for the duration
of the call.
Control Channel One of the four highest frequencies in a Trunking system that is used
to provide a continuous two-way communications path between
Central Controller and all radios on the system.
CSQ See “Carrier Squelch”.
Data Operated Squelch (DOS) If enabled, DOS will detect an incoming packet of the same signalling
scheme as the radio and squelch the audio for the duration of the
packet. A small blip of data will be heard but most of the packet will
not be heard.
Defaults Standard settings that the RSS uses for input/output (I/O) port
locations, file locations and display settings. Also, the values a field
will automatically contain if a user does not specifically change it.
Default Drive The disk or diskette drive that the RSS will use to get or save data or
files. You can change the default drive from the SERVICE SOFTWARE
CONFIGURATION MENU (F9).
DOS See “Data Operated Squelch”.
DPL A continuous sub-audible data signal that is transmitted along with a
carrier. A radio that has DPL on the receive frequency will require both
the presence of carrier and the correct DPL code before it will unmute.
In addition, if there is DPL on the transmit frequency, the DPL code
will be continuously relayed during transmissions made on that
channel.
DTMF Acronym for Dual Tone Multi-Frequency. DTMF is a signalling system
used by the telephone system.
EEPROM Electronically Erasable Programmable Read Only Memory. Used by the
radio microcomputer system to store the radio’s codeplug data
(personality).
Emergency Alarm A feature that triggers an alarm output on a console when an
emergency signalling message is received.
Encoder Features Features relating to the transmit (or encode) portion of a signalling
system(s).
Failsoft In the event that the Central Controller should fail, the radios in the
system will enter a “Conventional” pre-assigned failsoft channel. Each
Trunked repeater in the system will key and transmit a data word
informing every radio in the system that the system has gone into the
failsoft mode and communication will act as a Conventional radio
repeater.
Field Choices A set of direct-entry values (or values that can be scrolled) from which
the user may select to populate a field (feature) on an RSS screen.
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