ESN Electrical Serial Number
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.
ICCID Integrate Circuit Card Identity
IMEI International Mobile Equipment
Identifier
IMSI International Mobile Subscriber
Identity
Iosu Inter-OS User for user IP traffic
iosc Inter-OS Control for control IP
traffic
Ite1 Adapter name used by the radio
for LTE traffic
IV&D Integrated Voice and Data
KVL Key-variable loader: A device
for loading encryption keys into
the radio.
LCD Liquid crystal display.
LED Light-emitting diode.
Li-Ion Lithium ion.
LTE Long Term Evolution
(telecommunication). LTE is a
standard for wireless
communication of high-speed
data for mobile phones and
data terminals.
Man Down A life-saving feature that senses
the radio user may be in trouble
by monitoring the whether the
radio is in a vertical or
horizontal position or whether
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