8M083X25 R14
APX Series P25 Interface
DVRS Installation & Programming Guide
–
PART II
January 2019
Page 78 of 153
Field Name
Range
Description
Notes
MDC Decode
Delay Time
0-1000 ms
Set to 200 ms more than MDC ‘System
Pretime’ programmed in PSU.
If set to 390 ms or less, the DVR will wait
for MDC signaling to be decoded before
proceeding. If MDC is decoded DVR will
proceed
accordingly
(initiate
call,
emergency handling, etc).
If set to 400 ms or more, the DVR ignores
PSU emergency retries for the duration of
the timer to allow proper processing of a
decoded MDC1200 emergency to the
system and sending of emergency ACK to
the PSU.
If the PSU MDC ‘System
Pretime’ is set to 50ms,
this field should be
programmed as 250ms.
If the PSU MDC ‘System
Pretime’ is set to 700-
800ms, this field should
be programmed as
1000ms.
MSU Mode
Steering Hang
Time
0-60 seconds
When programmed to 0, the MSU stays
on the steered mode after the PSU
inbound call is over.
If programmed to >0, the DVR forces the
MSU to return to the original MSU mode
when the PSU inbound call ends and the
programmed timer expires.
Applicable when Steering
is Enabled.
Microphone
Signaling
None
Leading
Trailing
Both
Specifies the type of MDC or TPS
signaling sent by the DVR to the Local
PSUs upon MSU Microphone PTT.
TPS signaling is
applicable to TPS DVR
Channels only.
Encrypted Call
Support
Inbound Calls
Enabled
Enable/Disable
Check Box
When enabled the DVR is capable of
handling P25 Encrypted calls while on
analog DVR channel.
Related to
‘Outbound
Call Audio
’ field: Enable
when Outbound Call
Audio set to Digital,
Disable otherwise.
Outbound Call
Audio
Digital
Clear
Warning Tones
Specifies the DVR repeat type when P25
Encrypted Outbound Calls are received
by the MSU and an Analog DVR channel
is selected.
Applicable to Analog
Mode only. Related to
‘Inbound Calls Enabled’
field
.
Important: Current
implementation only
supports ‘Clear’
selection if MSU is
operating on
Conventional Digital
capable mode.
Simplex
PPI Interval
Disabled
500-10000ms
When enabled (Simplex Analog DVR
channels only), the DVR will periodically
interrupt transmissions during System
outbound calls and check for PSU activity.
If PSU activity is detected, the DVR will
drop the outbound call repeat and give
higher priority to the PSU Inbound call.
Applicable to Simplex
Analog DVR channels
only.
