8M083X25 R14
APX Series P25 Interface
DVRS Installation & Programming Guide
–
PART II
January 2019
Page 122 of 153
Steering and Emergency
•
If steering is disabled on the current DVR channel, local PSU emergency is
declared on the currently selected MSU channel (no steering).
•
If steering is enabled on the current DVR channel, the local PSU emergency is
declared on the new (steered) MSU mode.
•
When MSU is in emergency call state (‘
Put DVR in Emergency Call State
’ is
enabled), the local PSU calls handling is defined by the
‘Steering in Emergency’
programming for the specific DVR channel. If
‘Steering in Emergency’
is
Disabled, the DVR repeats any local PSU calls on the emergency channel (no
steering occurs).
•
If ‘
Steering in Emergency’
is enabled, the DVR will steer and then key up the
MSU. In this case the MSU will re-declare Emergency call on the new (steered to)
channel.
•
If ‘
Put DVR in Emergency Call State’
is Disabled (local PSU and MSU
programmed for Emergency Alarm only), an inbound local PSU call initiated while
the MSU is waiting for emergency ACK, should terminate MSU emergency and
steer the MSU to the corresponding MSU mode/channel without re-declaring the
emergency alarm on the new MSU channel.
MSU Operating on TDMA (P25, Phase 2)
When the MSU is switched to a TDMA capable mode, the DVR can operate in either
Analog, Forced Analog, Forced Analog All or Digital mode.
For Forced Analog & Forced Analog All mode operation, please refer to the
Forced
Analog & Forced Analog All Mode
section of this document.
When operating on TDMA system, any TDMA specific feature that can cause the MSU to
interrupt an ongoing transmission will also affect the proxying of Local PSU transmissions
to the system. The Local PSU will not receive an indication that its proxy transmission
from the MSU to the system may have gotten interrupted
.
