8A083X30 Rev.11
APX Series P25 Interface
DVRS User’s Guide
January 2019 Page 90 of 94
File containing DVR personality (dpd) and calibration data of
the specific DVR unit. Typically saved in the following format
xxxxxxxx.epr where xxxxxxxx is the SN of the specific DVR.
Federal Communications Commission.
Fixed Network Equipment – Trunking or Conventional System
Infrastructure
Hybrid DVR Mode of operation where communications
between the DVR and the P25 ‘DVRS enabled’ PSUs are
digital while the voice communications are forced to be analog
when the MSU is operating on a non-P25 channel / TG. When
the MSU is operating on a P25 channel / TG, the DVR is
operating in Digital mode (digital voice and signaling).
P25 Message periodically sent by a Primary DVR to other
DVRs during Primary/Secondary processing.
Hang Up Box – refers to the MSU Microphone being on hook
or off hook.
In Car Monitor – when enabled in the MSU, allows the MSU
user to monitor voice traffic to and from the local PSU
A Call transmitted by Local PSU and received by the DVR.
DVR Mode which provides extended portable-to-portable voice
and data range by repeating Local PSU (optionally MSU)
communications without keying up the Mobile radio interfaced
to the DVR.
PSU switched to the DVR channel and used for
communication with the DVR
When enabled, the MSU reverts to local call if the MSU fails to
access the system.
MSU / PSU - A programmed combination of operating
parameters.
DVR – OFF, SYSTEM or LOCAL (see DVR Mode)
Maximum Permissible Exposure.