8A083X30 Rev.11
APX Series P25 Interface
DVRS
User’s Guide
January 2019
Page 35 of 94
DVRS Status Tones - PSU
P25 ‘DVRS Enabled’ PSU
The following DVRS-only specific tones are available (if programmed) in the P25 PSU:
TONE TYPE
TONE NAME
DESCRIPTION
Series of short beeps
Go Ahead
System (clear)
DVRS system mode talk permit tone, clear
voice
Series of short beeps
Go Ahead
System (secure)
DVRS system mode talk permit tone,
encrypted (secure) voice
Series of short beeps
Go Ahead Local
(clear)
DVRS local mode talk permit tone, clear
voice
Series of short beeps
Go Ahead Local
(secure)
DVRS local mode talk permit tone,
encrypted (secure) voice
Low pitched tone
every 30 seconds
Low Car Battery
Sent by the DVRS when the car battery
voltage is below the programmed threshold
Series of short beeps
Queued Call
Call has been queued, waiting for system
grant
Two short beeps
No Activity
Timer Expiration
Warning tones sent to alert the PSU users
that the DVR will switch from SYS/LOC to
OFF. Sent every minute for the last 5
minutes prior to the switching.
Three beeps
DVR Active
Tones sent upon DVRS activation (SYS or
LOC mode).
Table 8 P25 DVRS Enabled PSUs
– DVRS Specific Tones
Generic P25 PSUs
‘Low Car Battery’, ‘No Activity Timer Expiration’ and ‘DVR Active’ tones (as described in
