Manchester P25 System

[centromere]

Well, for instance, someone with inside knowledge communicated on this forum in particular and let us know that a new system is in place with the 858.2125 freq being used as the primary cc. If this wasn't the case, people in the area monitors frequencies and will hear the noise that you heard, and would monitor closely with a unitrunker software that would show the development of the new system being built with additional frequencies that pop up.

Another giveaway is that the city announced that they would be using the same frequencies as the old system. They would slowly add on the frequencies when the system becomes ready (radios put in cruisers, portables are programmed).

I've successfully decoded some packets from the control channel:

====== NAC 0x8a1 ====== Manchester ======
rf: syid 8a6 rfid 1 stid 1 frequency 859.487500 uplink 814.487500
net: syid 8a6 wacn bee00 frequency 859.487500
secondary control channel(s): 857.937500,858.212500,858.487500
stats: tsbks 7530 crc 0

voice frequency 856.762500 tgid 12003 58.3s ago count 49
voice frequency 857.237500 tgid 11003 70.7s ago count 20
voice frequency 857.487500 tgid 12053 21.3s ago count 37
voice frequency 854.987500 tgid 12053 3.2s ago count 22

tbl-id: 0 frequency: 851.006250 step 0.006250 offset -45.000000
tbl-id: 1 frequency: 762.006250 step 0.006250 offset 30.000000
tbl-id: 4 frequency: 935.012500 step 0.012500 offset -39.000000

Also, the police are using AES256 (ALGID 84).

 

[NFR85]

What is the tg 10001?

Sounds like fire dispatch, but no ID on what this tg is...

I believe that is the K-Unit I don't know what number. Or maybe Maintenance I'm seeing 10002, 10004 as well doing test counts.

 

[Dave2582]

Talkgroup 11007 is PD Details. Active, in the clear. I submitted the info to the database.

 

[PH_Radio]

Are there any updates on this? I think I have most TG in place but when PD comes up I show a signal but hear no audio at all?

Using a BCD436. Pretty new to this digital stuff but am fairly knowledgeable about the old.

Thanks.

 

[Dave2582]

Are there any updates on this? I think I have most TG in place but when PD comes up I show a signal but hear no audio at all?

Using a BCD436. Pretty new to this digital stuff but am fairly knowledgeable about the old.

Thanks.

Manchester pd have gone encrypted. You won't be able to hear anything.

Sent from my SM-N910P using Tapatalk

 

[PH_Radio]

Well at least I know it's not something I'm doing wrong.