Understanding UniTrunker Decoder Logs

Status
Not open for further replies.

lukekb

Member
Joined
Sep 4, 2013
Messages
49
I am trying to figure out SmartNet control channel messages. To do this I have been looking at the decoder logs from UniTrunker. I am confused though. Does Unitrunker put all of the control channel messages in the log?

I am confused on the messages that make up a Grant. I thought the Grant sequence had to start with a 0x308, 0x320, or 0x321 command, followed by a message with the source and then finally a message with the talkgroup and frequency.

Unitrunker seems to be pulling Grants out of very different sequences:

8209 G 12A
2AA6 G 30B Net ID=8209, DChan=2A6 0.0000
5F5E I 12D
87D0 G 2A9 Channel Grant Astro 2A9 I 5F5E -> G 87D0
82A1 I 049
88B0 G 1C5 Channel Grant Astro 1C5 I 82A1 -> G 88B0
5F5E I 12D
87D0 G 2A9 Channel Grant Astro 2A9 I 5F5E -> G 87D0
4B40 G 3C0 System Status [2] = 0B40
5F5E I 12D
87D0 G 2A9 Channel Grant Astro 2A9 I 5F5E -> G 87D0
0000 G 360 Site 1
5F5E I 12D
87D0 G 2A9 Channel Grant Astro 2A9 I 5F5E -> G 87D0


Is it simply that a 0x3-- message can put it into a mode where Grant sequences can start and any number of Grants can be stacked together?

Any pointers on the different possible SmartNet message sequence that could make up a Grant?
 

SCPD

QRT
Joined
Feb 24, 2001
Messages
65,126
Location
Virginia
Hi Luke;

lukekb said:
Does Unitrunker put all of the control channel messages in the log?
Yep.

Motorola trunking is really three different dialects.

1. Type 1.
2. Type 2 with fixed repeater input offset.
3. Type 2 with "explicit" channel addressing for repeater inputs (big hint here).

Understand that "SmartNet" is really just a marketing term. It once defined a specific feature set but has morphed over the years to have little meaning today. Most island systems run SmartZone controller software with the extra "zone" features turned off.
 
Status
Not open for further replies.
Top