Jasper County TDMA Talkgroups replacing Phase 1 TGs

[wbloss]

NEW Phase2 Talkgroups showing up in Jasper County REPLACING old Phase 1 TGs

𝟰𝟮𝟬𝟱𝟱: 𝗖𝗮𝗿𝘁𝗵𝗮𝗴𝗲 𝗣𝗗 (there were NO calls yesterday on 44062)
𝟰𝟮𝟯𝟬𝟱: 𝗝𝗔𝗦𝗖𝗢 𝗦𝗵𝗲𝗿𝗶𝗳𝗳 (there were no calls yesterday on 27703)
𝟰𝟮𝟯𝟭𝟮: 𝗝𝗮𝘀𝗽𝗲𝗿 𝗠𝘂𝗻𝗶 𝗟𝗮𝘄 (Carterville, CJ, Dunweg etc. There were no calls yesterday on 27705)

Note: these were all heard on the Joplin 700 site or Granby, not yet on the Jasper Simi Z4/S2.
Depends on the radio - some were using Phase 1, and some showed phase 2 slot 0 or 1,
The changes have been made in the database

 

[MissouriSirens]

I wonder how you actually check if a TG is Phase 2 or Phase 1. I assume its something that requires admin access?

 

[nd5y]

I wonder how you actually check if a TG is Phase 2 or Phase 1. I assume its something that requires admin access?

How who checks? Admin access to what?
You can analyze the control channel and see if a trunked system is capable of P1 or P2.
Whenever a user radio transmission is made you will instantly see if the talkgroup is P1 or P2 or both (but not at the same time).

I haven't used the late model Unidens so I don't know exactly what information they are capable of showing in the system analyze mode but you can used software like DSD and Unitrunker to do it.

 

[PVPD730]

I wonder how you actually check if a TG is Phase 2 or Phase 1. I assume its something that requires admin access?

As nd5y indicated, there are software programs that will tell you whether a P25 system is Phase I or II. SDR-Trunk, DSDPlus, Unitrunker, and Pro96com are some good options. Personally, I like SDR-Trunk. Pro96com is buggy and often crashes (they haven't updated it since 2017).

 

[wbloss]

Even recording the comms and then playing back in Universal Scanner Audio PLayer https://www.fmuser.net/wap/content/?20473.html will show you the details of Phase 1 vs 2 on each recording

 

[hitechRadio]

I wonder how you actually check if a TG is Phase 2 or Phase 1. I assume its something that requires admin access?

Controlled by the systems manager, three choices. FDMA-Only, TDMA-Only and Dynamic Dual MODE (DDM).

Many new P2 systems will start out as DDM on some TG's as they replace legacy radio's that don't support TDMA or radios not flashed for TDMA.

Example DDM mode: If a talkgroup is set for DDM mode TDMA will be used, as long as NO FDMA radio's are affiliated. If an FDMA radio is affiliated the talkgroup will go to FDMA mode on the next PTT.

Note this can be site by site basis. Meaning, assume 3 sites (Non-Simulcast). The DDM Talkgroup has a radio affiliated at all 3 sites.
If one of the 3 sites has one FDMA radio affiliated, just that one site will switch to FDMA, the other 2 remain TDMA. The CORE does the transcoding between TDMA and FDMA.

In the case of simulcast, all simulcast towers would switch FDMA on the DDM talkgroup. Since from a radio/scanner perspective, a simulcast system is just one big site.

If the System consist of a mix of simulcast sites and multicast sites (which is the case on MOSWIN). Assume a talkgroup is affiliated on both simulcast site and a non-simulcast site. If a FDMA user affiliates on one of the non-simulcast sites, the simulcast site will stay in TDMA, so long as no FDMA radio if affiliated on the simulcast site. And vis-versa.

You can also control how many channels are TDMA capable at a site.

Long and short is, only the System Admin really knows what a particular TG is set for. And there is much more to it than I mentioned here.