P25 Opcode 0A Mfid 90

[johnmoe1]

Listing to trunking control channels on ARMER (MN) P25 system...

Outbound trunking message 0A 90 seems to be associated with the emergency button being pressed. I haven't seen this mentioned anywhere.

Example:
0a 90 00 00 00 09 e4 01 a4 33

That is talkgroup 09e4 and radio id 01a433.

 

[mikey60]

It could be that, or it could be forcing the radio to switch to that talkgroup (which may be related to the emergency button). Hard to say out of context. I've never seen this message before.

What I have seen on the MPSCS in Michigan is the emergency button indicator on the same talkgroup...

Mike

 

[mikey60]

Actually I have been told about this one before. I have it being decoded in Pro96Com, but it's still a question mark as to the meaning.

Mike

 

[WA0CBW]

I believe the emergency call can be configured to take place on the selected talk group or programmed to go to a specific talk group.

 

[WayneH]

I've got it in my logs but it's been so long I can't recall what I was doing at the time to create it. I'll let you know Mike next time I test it again.

 

[mikey60]

Sounds good Wayne. Thanks!

Mike