22
English
B
A
SIC
RA
DIO CA
LLS
•
If a continuous talk-prohibit tone is heard
when the PTT switch is pressed,
transmission is not possible. The radio may
be out of range.
Low-Battery Alert
Your radio emits an alert tone when a low-battery
condition is detected.
Coded Squelch Operation
Tone Private-Line® (PL), Digital Private-Line™ (DPL),
and carrier squelch operation are all available in your
radio, on a per-mode basis. When in carrier squelch
operation, all traffic on the mode is heard. When in PL
or DPL operation, your radio responds to only those
messages intended for you. When this feature is
mode-slaved, PL, DPL, or carrier squelch is
programmed to each mode.
Whenever the radio is operating in carrier squelch, the
display shows
C
.
Variable RF Power Level (Selected Models
Only)
Radios can have more than one power level. High
power can be programmed on modes where high
power is permitted, and low power can be
programmed on all other modes. The high-/low-power
feature can be selected via the menu keys.
FAILSOFT OPERATION (TRUNKED
SYSTEMS ONLY)
The “failsoft” system ensures continual radio
communications capability during a trunked system
failure. Your radio automatically goes into failsoft
operation if the central trunking controller fails for any
reason. While in failsoft operation, your radio transmits
and receives on a predetermined frequency on a
conventional mode. When the trunked system returns
to normal operation, the radio automatically leaves the
failsoft operation and returns to trunked operation.
During failsoft operation,
1
You will hear a faint
“beeping” sound
every ten seconds.
Alternates between
and
2
Your radio becomes unsquelched.
FAILSOFT
PLANT POLICE
20L01-A_PR_UG_MTX4500.book Page 22 Friday, April 13, 2007 2:47 PM