8A083X30 Rev.11
APX Series P25 Interface
DVRS
User’s Guide
January 2019
Page 38 of 94
In Car Monitor (ICM)
The ICM feature allows the MSU to monitor PSU Voice traffic and is configurable in the
MSU codeplug as follows:
•
ICM is enabled / disabled globally in the MSU via the ‘ICM Allowed’ Field
•
I
f ‘ICM Allowed’ is programmed in the MSU then ICM operation is further
configured on a pe
r MSU channel basis via the ‘ICM Allowed’ codeplug field.
•
ICM functionality is further configured to be triggered by either Hang Up Box
(HUB) on / off transitions OR via menu item / button on the MSU control head or
keypad microphone.
When ICM functionality is configured to be triggered via HUB on/off the
n ‘ICM Selected’
operation takes place w
hen the MSU microphone is placed on HUB, ‘ICM All’ operation
will take place when the MSU microphone is taken off HUB.
For details on how to program the ICM functionality and options in the MSU, please refer
to the corresponding Motorola Documentation.
When the MSU is operating on a Trunking FNE with ICM enabled the following
configurations are available:
•
‘ICM Selected’ – the MSU speaker unmutes to PSU audio matching its selected
TG ID (digital DVR channel) or all qualified analog PSU audio (analog DVR
channel).
•
‘ICM All’ – the MSU speaker unmutes to all PSU audio regardless of the TG ID
(digital DVR channel) or all analog PSU audio (analog DVR channel).
When the MSU is operating on a Conventional FNE with ICM enabled the following
configurations are available:
•
‘ICM Selected’ and MSU configured for Selective Squelch – the MSU speaker
will unmute only to PSU audio matching its selected TG (digital DVR channels) or
qualified analog audio (analog DVR channels)
•
‘ICM Selected’ and MSU configured for Normal Squelch – the MSU speaker will
unmute to any PSU TG audio (digital DVR channels) or qualified analog PSU
audio (analog DVR channels).
•
‘ICM All’ – the MSU speaker unmutes to all PSU audio
