8M083X25 R14
APX Series P25 Interface
DVRS Installation & Programming Guide
–
PART II
January 2019
Page 114 of 153
Emergency Revert through PSU
The PSU can be configured to revert to a preprogrammed talkgroup or zone / channel
when it enters Emergency. With the Talkgroup revert option, the PSU does not change its
mode but rather stays on the currently selected channel and performs all emergency
related voice and signaling by using the Revert Talkgroup ID. Talkgroup revert is only
supported on the APX ‘DVRS’ Enabled PSUs.
Emergency operation during TG Translation
Emergency operation is affected by TG Translation as follows:
•
Inbound Emergency Alarm
received by the DVRS on TG X will be translated and
repeated locally on all translated TG IDs that are selected on Local PSUs, which
are currently affiliated with the DVRS. The Emergency Alarm is also translated to
the ID of the TG selected on the MSU and forwarded to the System.
•
Outbound Emergency Alarm
received by the MSU on the MSU selected TG (TG
Y) will be translated and repeated to the local PSUs on all translated TG IDs that
are selected on Local, affiliated with the DVRS PSUs.
•
Inbound Emergency Call
on TG X will be translated by the DVRS to the ID of the
TG selected on the MSU and will be repeated locally on the translated TG.
•
Outbound Emergency call
received on TG Y selected on the MSU will be
repeated by the DVRS to the Local PSUs on TG Y.
•
If Emergency Revert is programmed in the local PSU then:
a. If the revert TG is on the DVRS TG Translation list, then proxied PSU
Emergency will be translated to the ID of the TG that is selected on the
MSU. Emergency Alarm will be repeated locally on all Translation enabled
TG IDs that are selected on local (affiliated with the DVRS) PSUs.
b. If the revert TG is not in the DVRS TG Translation list then the emergency
will be proxied and the inbound, outbound and local repeat will be on the
new emergency revert TG.
•
If the MSU (interfaced to the Primary DVR) is placed in Emergency and
programmed to revert in Emergency then a subsequent local PSU emergency will
also be translated and declared on the MSU’s emergency revert TG.
Fireground (FG) Signaling
The Fireground deployment consists of a fleet of subscribers communicating with an
incident commander position using digital signaling and either analog or digital voice. If
Fireground (FG) signaling is enabled in the local PSUs and on the selected full duplex
DVRS channel, the DVR repeats locally the FG messages received form the local PSUs
to the FG terminal. FG Emergency signaling received from the local PSU can be either
repeated locally, sent to the system or both (as programmed in the DVR).
NOTE:
Only
‘Generic P25’ PSUs support Fireground operation.
