8M083X25 R14
APX Series P25 Interface
DVRS Installation & Programming Guide
–
PART II
January 2019
Page 92 of 153
DVR System Topologies
The following table provides an overview of all possible DVR system configurations and
whether each is supported. The rest of the document provides details on the supported
system topologies.
PSU Type
DVR Ch
MSU / System Type
Conv.
Analog
Conv.
P25
Type II
Trunked
P25 FDMA
Trunked
P25 TDMA
Trunked
Analog
Analog
Yes
Yes
Yes
Yes
Yes
Digital
No
No
No
No
No
Mixed
Yes
Yes
Yes
Yes
Yes
Forced
Analog
Yes
No
Yes
No
Yes
Forced
Analog All
Yes
Yes
Yes
Yes
Yes
P25
Generic
Analog
No
No
No
No
No
Digital
No
Yes
No
Yes
No
Mixed
No
Yes
No
Yes
No
Forced
Analog
No
Yes
No
Yes
No
Forced
Analog All
No
No
No
No
No
P25
DVRS
Enabled
Analog
No
No
No
No
No
Digital
No
Yes
No
Yes
Yes
Mixed
No
Yes
No
Yes
Yes
Forced
Analog
Yes
Yes
Yes
Yes
Yes
Forced
Analog All
Yes
Yes
Yes
Yes
Yes
Table 12 DVR System Topologies- Voice
Global DVRS Features
This section describes Global DVRS features, which are common for all DVR channel
types.
Automated VR Activation (AVRA)
The MSU has Vehicular Interface Port (VIP) inputs that can be wired to a switch (refer to
the Motorola MSU installation documentation), which can be used for activation /
deactivation of the DVR. The switch that asserts the VIP Input could be the opening of the
car door, the removal of a PSU from the charger, a manual switch, parking brake switch
or a combination of the above. Alternatively, the AVRA trigger can be wired to the
designated pin on the DVR auxiliary cable as described in Part I of this manual.
The handling of the VIP inputs is determined by the ‘AVRA Function’ field programming in
the DVR as follows:
