APCO P25 Trunking and Conventional
Basic functions
Trunking
System
Conventional
System
Functions
21 Priority Group Monitor
Monitoring the arrival of groupcall
signals with high priority level.
22 Emergency Alarm
Emergency alarm.
23 Call Alert
Call alert.
24 Short Message
Short message function
25 Status Update Request
Status message function
26 Status Query
Status message function
27 Status Query Response
Status message function
28 Radio Unit Monitor
External monitor function.
29 Radio Check
Checking radio validity
30 Receive Radio Inhibit & Uninhibit
Inhibit/un-inhibit the radio
31 Transmit Radio Inhibit & Uninhibit
Inhibit/un-inhibit the radio
32 Radio Detach
Cancel registration from repeater
Registration to the radio from the
er
34 Group Affiliation (CAI)
Dynamic group function
35 Group Affiliation (Static)
Dynamic group function
36 Roaming
Roaming the trunking sites
37 Roaming Restriction
Restrict roaming.
Restrict movement of control CH
Restrict movement of control CH
.
39 Site Select
Select control CH.
40 Type 3 Encryption
Indicate Type 3 encryption
41 Voice Encryption Support
Indicate voice encryption
42 Data Encryption Support
Indicate voice encryption
44
Simple Static Key Security Parameter,
Assignment
Functions using encryption key,
group ID, CH selector etc.
45 TGID Security Parameter Assignment
Functions using encryption key for
OTAR and group ID.
46 LLID Security Parameter Assignment
Functions using encryption key and
lo
47
Channel Selector Switch (CSS) Security,
Parameter Assignment
Functions using encryption key and
channel selector.
48 Packet Data
Packet Data communication ready
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