Glossary
English
136
COTS Commercial Off-The-Shelf
Cursor
A visual tracking marker (a blinking line)
that indicates a location on the display.
Deadlock
Displayed by the radio after three failed
attempts to unlock the radio.The radio must
be powered off and on prior to another
attempt.
Digital Private
Line (DPL)
A type of coded squelch using data bursts.
Similar to PL except a digital code is used
instead of a tone.
Digital Signal
An RF signal that has a pulsed, or discrete,
nature, rather than a continuous nature.
Dispatcher
An individual who has radio system
management duties.
DSP Digital Signal Processing
Dynamic
Regrouping
A feature that allows the dispatcher to
temporarily reassign selected radios to a
single special channel so they can
communicate with each other.
DSR Dynamic System Resilience
EID Encrypted Integrated Data
ESN Electrical Serial Number
Term Definition
Failsoft
A feature that allows communications to
take place even though the central
controller has failed. Each trunked repeater
in the system transmits a data word
informing every radio that the system has
gone into failsoft.
FCC Federal Communications Commission.
FM Frequency Modulation
Hang Up Disconnect.
Home screen
The first display information after the radio
completes its self test.
IV & D Integrated Voice and Data
Term Definition
APX_4000_M3.book Page 136 Thursday, March 13, 2014 10:59 AM
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