8A083X30 Rev.11
APX Series P25 Interface
DVRS User’s Guide
January 2019 Page 14 of 94
Introduction
The P25 DVR allows Portable Subscriber Units (PSU) to be used in areas where only
MSU coverage is available and PSU coverage is either intermittent or nonexistent.
Installed in the trunk of a car, fire truck, armored vehicle, ambulance or configured as a
Transportable or Fixed mount DVR, the P25 DVRS extends radio communications when
the PSU users are outside of the vehicle, inside a nearby building or in any portable
radio marginal coverage areas. The P25 Digital Vehicular Repeater (DVR) is designed to
be seamlessly interfaced to a compatible remote mount APX series Digital Mobile
Subscriber Unit (MSU) with or without Control Head (CH).
The DVR may also be used as a standalone (Tactical) repeater. The operation of the
Tactical DVR is described in publication 8A083X21.
The DVR extends voice (clear or encrypted) communications as well as key trunking
system features. It can be configured to provide various advanced options to the PSU
users.
The following table summarizes the DVRS compatibility scenarios:
Table 1 DVRS vs Infrastructure Compatibility
*DVRS Channel Types:
A = Analog
D = Digital
M = Mixed
FA = Forced Analog
FA-All= Forced Analog All
*Applies only to APX Portables
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