The state of Tennessee Advanced Communications Network (TACN)

[davewhall29]

so what do i need to program to hear the tenn highway patrol the tvrs or wait till this troopnet gets running

TVRTS is what Chatt & Knox will be using. Chattanooga is already on the system now and Knox is supposed to switch over Monday.

 

[davewhall29]

New TGID

I'm picking up TGID 15152 on the Madisonville site. Heard them talking about opening gates, so I figure it is a prison, since all the others are in the same area as this one. But I can't identify it.

 

[Thunderbolt]

The TROOPNET is a trunked repeater systems that allow statewide coverage where the TVRTS doesn't reach. It is a mixed VHF and 7/800 MHz system to provide coverage everywhere. My guess is that eventually it could all be one system, but maybe not. In the TVRTS database, the Williston site is actually part of the TROOPNET system.

Troopnet is being administered by the state of Tennessee (hereafter the "State"). An agreement has been reached and signed that transfers the TVRTS over to the State; hence, becoming part of Troopnet. In return for this arrangement, the State will take over all licensing, maintenance, and operations costs of the current TVRTS TRS. Therefore, it will become one unified, multi-band interoperable radio system that will allow statewide roaming capabilities for all subscribers, from one end of the state to the other. Likewise, all Troopnet radios will have the capability to communicate on Project 25 trunking systems under construction in neighboring states.

73's

Ron

 

[INDY72]

Correct, the entire system will become TroopNET, with the original TVR and other regional systems being the main "Loadout" systems as they will have much larger abilities with larger freq loads etc. The original TroopNET sites are ALL only 3 freqs per site and thus can NOT handle the massive loadout capabilities the other systems thaqt are joining can. Eventually it will be a truly statewide VHF/700/800 P25 system combining Motorola, Harris, Tait, and others systems into one big network. It will be interesting to see how it all works out. As mentioned it will be linked vias software to MSWIN, VIPER/VIPER25, AWIN, the future AL system, GAWIN and others for magor events such as hurricanes or a New Madrid event. The TroopNET sites are TDMA from the ground up, the TVR is FDMA, with some TDMA, but is converting to full TDMA over the next few years. By the time the full statewide network is completed it will be a fully TDMA P25 Phase II system. THP, TBI and RNTF's will all be fully encrypted once the system is rolling fully.

 

[medic9351301]

So there is no need to try to monitor this system since its going to be encrypted and phase 2 tmda

 

[SCPD]

What's RNTF?

 

[EZlistener]

These are preusmably the regional narcotics task forces that are organised by Judicial Circuits, such as "Fifth Circuit Drug Task Force," etc. Do a lot of drug interdiction on the roads. Very sensitive work, encryption probably a good idea here.

 

[INDY72]

TEMA, TWRA, and others will be not encrypted as far as we know at this time. The 3 freq TroopNET sites will be TDMA from the ground up. The TVR (which is becomming TroopNET) will be switching over to TDMA over the next few years with some sites already TDMA capable. THP is in the clear until ALL districts are on the TRS. RNTF is Regional Narcotics Task Forces. These are joint DEA and local LEA Narcotics teams. The TVR portion of TroopNET will be in compatability mode until everyone has TDMA capabilities.

The 3 freq sites will be State Level Agencies ONLY. Unless they add freqs later, those sites can NOT handle massive loadouts of users.

The only agencies that we DO know are going to be full time encrypted once everyone is onboard are TBI, THP, RNTF's.

Here is a basic explanation of why they are going TDMA for those that don't have an understanding:

Current P25 Phase I is FDMA, this means 1 talk/data slot per frequency. 3 freq site would mean only 2 usable talk freqs and one data freq as the CC. 5 freq site gives you 4 usable freqs to talk, and a CC. P25 Phase II is TDMA, which currently gives you 2 usable slots per frequency. 3 freq site TDMA gives you at least 4 usable talk slots using this. A 5 freq site TDMA gives you at least 8 usable talk slots. Now lets apply TDMA to a 20 freq site. That would mean 38 possible talk slots.

In the near future, TDMA will be capable of 4 Slots, and in the not too distant future, 6 slot TDMA.

 

[ButchGone]

The TVRCS was upgraded a few months ago to handle P25 Phase 2 TDMA so its already capable. Why are some thinking THP will encrypt the dispatch channels?
BG..

 

[ropin4gold]

I keep seeing where y'all are posting about TBI joining this system, being encrypted, etc. is there anything in writing showing this or is it just an assumption that because they are a state agency they are going to change over. As far as I can tell, when TBI split off from THP in the 80's they have had separate Coms. Also if you will look at the other state LE agencies bomb and arson, ag crimes, twra, state parks, etc it seems like they all run their own comms. Twra just built out a new system a few years ago and seem to be doing fine with it.

 

[INDY72]

To cut down on the number of sites, and money, some of the Troopnet sites in Middle and West TN will be VHF 3 channel sites.
We're waiting for Motorola to push out 7.13 firmware into the system, then sometime in late February / early March the Chattanooga District will cut over to the system. During the second quarter of this year the Knoxville District will cut over, then toward the end of the year the Fall Branch District will cut over.
There will be two Dispatch talk groups per district, one TDMA and one FDMA. The TDMA will be used for normal in car operation. The FDMA tlkgrp will be used when the Trooper is out of the car, and has to talk back through their in car repeater. Both dispatch talkgroups will be encrypted.

That. He also mentions elsewhere that per the codeplugs they got from Motorola for the radios, THP will be encrypted. I have also been told by others on promise of anonymity that once full cutover is done, THP will "flip the switch" and go encrypted. As for TBI, we were informed a while back they were going on the system and be encrypted from day one.

 

[INDY72]

TWRA IS already ion on the TVR part. In the clear thus far, whereas they were encrypted on the old VHF.
TN - Wildlife Resources Agency Talkgroups

DEC HEX Mode Alpha Tag Description Tag
15209 3b69 D TWRA 3 OPS Region 3 Ops Law Talk
15213 3b6d D TWRA EAST Operations Law Talk

 

[INDY72]

That also gives us an idea of the entire TWRA TG ID range.... I would suspect ANY TG in the 152** range of being TWRA.

 

[davewhall29]

Knox THP switched over

Knoxville THP (District 1) switched over to the TVRTS on Wednesday. TGID 47000...already submitted to DB.

 

[KD4YGG]

Troopnet - Dover Site

Searching the FCC database for "YW" service between 148-174 Mhz shows this site as a possible TROOPNET VHF site in Stewart County:

ULS License - Public Safety Pool, Trunked License - WQQI897 - TENNESSEE, STATE OF

Repeater Outputs
154.8150
155.1300
155.4450

Anyone in the area? If so, anything being transmitted as control channel?

 

[medic9351301]

whats twra

 

[medic9351301]

never mind

 

[EZlistener]

And the low band system apparently was shut down at the same time, even car-car repeaters. I suppose I still have Fall Branch to listen to for another month.

 

[INDY72]

TN is doing it a tad different from all the other Statewide TRS's I have monitored as they came online over the years. VIPER, NCSHP kept thier Low Band up during the transition, and from what I hear, still keeps it running "just in case". Palmetto 800, SCHP didn't "kill" thier old system until every district was online. MSWIN, MHP didn't even begin using it until it was in the final phases of the original buildout, and the Low Band, and High Band radios are still in the cars, since Statewide Low/Statewide High are very much still the SO/PD-MHP interop methods. AWIN, I didn't get to observe how ASP transitioned from their old nets to the legacy 800 MHz system, same for the legacy 800 MHz LWIN and LSP. But THP is going District by District as the system is fully built in that District, and once the TG goes live, they "kill" the Low Band, and High Bands completely as far as I can tell for the TROOPNET transition. Go figure. I do hope they are maintaining at least some form of backup, and some type of interop for all the Counties/Municipalities that are NOT jumping on the TROOPNET yet.

 

[EZlistener]

The THP High-band system (used largely with portables) is operating on a waiver from narrow-banding as it is to be retired. I have been looking at the FCC records and have some of the Knoxville district sites and freqs located, but not Green Top, Sevier County, where lots of the Knoxville area traffic is repeated.