New P25 Trunking System

[NebraskaCoder]

So, I saw this the other day. Unfortunately, the other site doesn't have any details yet. I'm not sure they need a new site unless other counties are going to join them or if this is the backbone component to ORION while letting Sarpy have their system separated.

 

[tyytor]

TG 65536 probably is a 'blank' channel. They program it into the radio so it stays on system instead of the user getting an unprogrammed channel and the radio unaffiliating from the system. At least that's what Omaha did.

hi, i was told the same thing now that i think about it, but that was the SD state trunking before i moved to WY, not sure how true it is but was also told that it is the highest talk group aloud on a MOT system? my $0.02.

 

[cellphone]

In decimal format, the ID appears in the range of 0 to 65535. ID number 65536 is used to indicate a BSI or base station identification event on a voice channel. It's not an actual call or group ID. You may hear a morse coded station ID on the affected voice channel.
Source:
UniTrunker | Motorola

 

[cellphone]

So, I saw this the other day. Unfortunately, the other site doesn't have any details yet. I'm not sure they need a new site unless other counties are going to join them or if this is the backbone component to ORION while letting Sarpy have their system separated.

View attachment 70417

View attachment 70418

Site 15-136 may be some bogus data that was received by Unitrunker. You will get some strange site, frequencies, and other incorrect data due to some decoding errors, especially with lower signal strength. Select the site, and click the minus icon to delete the site. If it comes back, then it might be valid.

 

[nd5y]

duplicate post deleted

 

[realgeo]

Are the talkgroups Phase 1 or Phase 2? Since George posted that he heard Talkgroup 201 on his 396XT and the frequencies are only shown once in Unitrunker screenshot, I'm assuming Phase 1. Keep up the great info!

Howdy Joe and all!

The system appears to be running all Phase 1 TGIDs at the moment, but certainly has the capability of Phase 2. Phase 1 / Phase 2 operation can be configured on a per-TGID basis, as has been observed on other systems.

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[realgeo]

TG 65536 probably is a 'blank' channel. They program it into the radio so it stays on system instead of the user getting an unprogrammed channel and the radio unaffiliating from the system. At least that's what Omaha did.

The 65535 "talkgroup" is the system itself and is related to how the subscriber radios communicate with the controller.

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[realgeo]

New talkgroups and confirmed talkgroups are here (and some hidden/unknown/future talkgroups showed up):

One thing to note about all of these talkgroups is that for each talkgroup on the new system, the group is ALSO on the old Sarpy County Public Safety system on a different talkgroup number but is the same group airing at the same time.

TG 201 (DEC) is either a Bellevue/Papillion Fire talkgroup. I forgot which ID it comes across on the old system, I saved it on my scanner but right now it is charging and I don't want to interrupt my SDR on the new system/spin up a new SDR for the old system.

TG 3 (DEC) is LE East. On the old system, it is TG 48 (DEC) but TG 003 (HEX). Interesting.

TG 7 (DEC) popped on my list of affiliated groups, but nobody keyed up. The radio affiliated to TG 7 (DEC) then switched to TG 3 (DEC) so my only guess is that is either INFO talkgroup or LE West. I would guess LE West since, in the old system, LE West is TG 112 (DEC) but 007 (HEX) which matches what LE East is doing. We'll have to wait for them to transition on that channel.

Here is a list of groups Unitrunker has seen. I labeled ID 3 - LE East myself. Ignore 65536 as that isn't a talkgroup but shows up on the Control Channel consistently. Possibly a bug.

View attachment 70232

Here are the observed radio IDs since I started Unitrunker. Of course, there are more but they will need to key up, power on, power off, or switch groups to be seen. Usually, after leaving monitoring running for about 7 days, the list will get pretty accurate as many radios will power cycle at some point in a weeks time. Obviously monitoring only radios will go unnoticed until something happens to them.

View attachment 70233

I still haven't seen all of the channels active yet (missing 4 frequencies that I've identified above). I'm guessing as more users enter the new system more voice channels will appear.

View attachment 70234

Listening to the Old and New systems this evening, TGID 5 appears to be LE Information.

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[realgeo]

Here's my most recent Groups file from DSDPlus for this new system - looks like TGID35 is also busy, though I haven't yet identified it.

P25, BEE00.47C, 3, 50, Normal, 885, 2019/04/16 20:29, "LE East"
P25, BEE00.47C, 5, 50, Normal, 72, 2019/04/17 18:04, "LE Information"
P25, BEE00.47C, 7, 50, Normal, 2385, 2019/04/17 16:00, "LE West"
P25, BEE00.47C, 31, 50, Normal, 17, 2019/04/15 18:57, ""
P25, BEE00.47C, 35, 50, Normal, 480, 2019/04/16 5:53, ""
P25, BEE00.47C, 59, 50, Normal, 1, 2019/04/15 9:40, ""
P25, BEE00.47C, 201, 50, Normal, 3896, 2019/04/17 17:51, "Fire-East"
P25, BEE00.47C, 203, 50, Normal, 3, 2019/04/15 13:57, ""
P25, BEE00.47C, 213, 50, Normal, 13, 2019/04/14 19:53, ""
P25, BEE00.47C, 227, 50, Normal, 52, 2019/04/15 19:35, ""
P25, BEE00.47C, 359, 50, Normal, 41, 2019/04/11 7:19, ""
P25, BEE00.47C, 527, 50, Normal, 2, 2019/04/16 7:17, ""
P25, BEE00.47C, 529, 50, Normal, 10, 2019/04/17 12:36, ""
P25, BEE00.47C, 567, 50, Normal, 22, 2019/04/11 12:56, ""
P25, BEE00.47C, 603, 50, Normal, 1, 2019/04/16 15:38, ""
P25, BEE00.47C, 2401, 50, Normal, 6, 2019/04/15 9:42, ""
P25, BEE00.47C, 2405, 50, Normal, 3, 2019/04/15 10:38, ""
P25, BEE00.47C, 2495, 50, Normal, 2, 2019/04/15 9:42, ""
P25, BEE00.47C, 2497, 50, Normal, 4, 2019/04/15 10:24, ""
P25, BEE00.47C, 4001, 50, Normal, 1, 2019/04/10 21:24, ""
P25, BEE00.47C, 4003, 50, Normal, 1, 2019/04/17 12:29, ""
P25, BEE00.47C, 4005, 50, Normal, 29, 2019/04/16 15:11, ""

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[realgeo]

Update - TGID223 on the new system is the Nebraska Medicine Bellevue hospital TGID.

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