8M083X25 R14
APX Series P25 Interface
DVRS Installation & Programming Guide
–
PART II
January 2019
Page 88 of 153
Field Name
Range
Description
Notes
PSU Proxy
Disabled
Check box
If this box is checked, the TG Proxying
feature is disabled and the Local PSU
and MSU must be on the same TG in
order to establish communications. If the
Local PSU and the MSU are on different
TGs, the Local PSU will not be able to
affiliate and as a result it will not be able
to make calls until the TG selection is
matched.
Applicable to Digital &
Mixed Mode only.
Allows Local PSU users
to switch to different TGs
and their calls to be
proxied by the DVRS
regardless of the
selected MSU TG (as
long as it is ‘DVR
Enabled’).
PSU Priority
Inbound
Takeover
Allowed
Check box
When enabled, the DVR gives higher
priority to a LPSU call initiated during an
ongoing LPSU call.
PSU Priority
Outbound
Takeover by
Voice Allowed
Enable /
Disable Check
box
Enables / Disables the PSU Voice
takeover when the MSU is receiving and
DVR repeating an outbound call.
PSU Priority
Outbound
Takeover by
Signaling
Allowed
Enable /
Disable Check
box
Enables / Disables the PSU Signaling
takeover when the MSU is receiving and
DVR repeating an outbound call.
Network Status
Reporting
Interval
0-255 sec
Determines the intervals for sending
Trunking Network Status messages
(Failsoft, Out of Range or Site Trunking)
as well as ‘Local Mode’ Indication to the
Local PSUs.
The Local PSU will wait
two times the
programmed interval
before it declares being
Out Of Range.
PSU Digital
Audio Queuing
700
– 1800ms
Defines the digital audio buffer, which
prevents the loss of audio at the
beginning of transmission while the MSU
is acquiring channel grant. Applicable to
Trunking systems where system access
channel grant may take 1000
– 1500ms
Default setting is
1000ms. Reducing the
buffering time provides
lower throughput delay,
however may result in
truncated audio when
accessing the system
due to poor coverage
takes longer.
P25 Preamble
Length
0
– 400ms
This setting must be matched with the
APX PSU programming to ensure
adequate PSU unmuting
Default setting is 40ms
PSU Affiliation
Timeout
0-72 hrs
Determines the time a PSU ID will be kept
in the DVRS affiliation table without
detecting any activity from the PSU. After
the timer has expired, the DVRS
deregisters the PSU and sends a
deregistration request to the system.
Recommended setting
should match that of the
‘Affiliation Inactivity
Timeout’ of the System
(default is 12 hrs).
