Somerset county P25 Phase I or II?

[djk]

Is Somerset county actually using P25 Phase II? I have a BCD396XT (no phase II support) and OP25 (phase II implemented) running on linux and hear the same activity on both.

 

[GTR8000]

Look at the system in the database and check the Mode column. If you see T, that means the talkgroup is TDMA.

 

[djk]

This is the reason I am asking. The database shows Somerset county as P25 Phase II and tags of T yet I am hearing them on the BCD396XT which is not supposed to be able to do TDMA P25 Phase II.

 

[Septa3371CSX1]

From what I understand only the 700 MHz side of the system is capable of Phase 2. The 500 MHz portion is apparently all Phase 1. Last time I was up that way last year the 700 side had Phase 1 and Phase 2.

 

[djk]

If they are simultaneously transmitting on phase I and II on the 700 band then that explains why the scanner is picking it as well. I need to looking into the OP25 code to see if it has a way to display the mode it picking up.

 

[W2SJW]

There is quite a bit of Phase-II traffic on the 500 side as of this summer.

I believe all repeaters on both sites are GTR8000's, and the only limiting factor for how the TG is actually being used is wether the subscriber radio is Phase-II capable.

A single older XTS affiliating to a TG will knock it back to Phase-I.

 

[Murenovich]

Yeah the system is a combination of Phase 1 and Phase 2. The 700Mhz simulcast broadcasts only in Phase 2 the majority of the time although as W2SJW mentioned all it takes is a radio on the system to be phase 1 and it kicks back.

Whenever a talkgroup is in Phase 1 it will broadcast on the 500 system so randomly you can get some of the tg's that are usually only on the 700Mhz phase 2 like Bridgewater PD and Hillsborough.

Eventually everyone will be migrated over to Phase 2 and at that point most likely all 700 as well.

All of the Fire EMS & OEM channels broadcast in Phase 1 on the 500, so if you just wanna listen to those i suggest only monitoring the 500 system as you wont get any hits on the 700. For listening to PD i have found the happy medium for monitoring all the tg's is to set the site hold time to 2 seconds for the 500 & 700 and putting them in a their own separate system.