Carroll County, TN 800Mhz DMR Public Safety System

[KD4YGG]

Under a new FCC application (File Number 0006837731) issued yesterday, 11-Jun-2015, looks like Carroll County is planning a new five-site 800Mhz trunked system, with emission designators indicating a DMR/Mototrbo format.

At Huntington, 966 Lexington Street:
858.2375
857.2375
856.2375

At McKenzie, 116 Cedar Street
858.0125
856.0125
854.0125

At Trezevant, on Harpor Street
858.7375
857.7375
856.7375

At Bruceton, 217 Cheatham Street
858.0375
857.0375
856.0375

At Cedar Grove, on Highway 70S
858.0625
856.0625
854.0625

 

[volstatescanner]

This one makes no sense to me, with the state building a trunk system all around you, and two other systems real close by why not take your 800 frequencies and leverage a deal to get P25 coverage?

 

[buddrousa]

That would be the local Motorola Dealer Selling mototrbo systems and telling the customer this is the newest best motorola trunking system that is better than the state system. Pressure sells

 

[INDY72]

That would be the local Motorola Dealer Selling mototrbo systems and telling the customer this is the newest best motorola trunking system that is better than the state system. Pressure sells

Yep. Both do TDMA, but only TACN has the best security as it was designed for Public Safety from the rip, only TACN can truly allow interop statewide, and they will find out that being cheap is not the best route when your putting your first responders lives on the line.

 

[kytnradios]

The Cedar Grove site is a water tower with a tower on it, and I noticed the old antenna that had been on it for years has been switched out as I went by the other day. At one time, I think it had a second antenna on it, as well. It's right off of Highway 70.

 

[tbzep]

What will it take to monitor the new system? I've never fooled with digital, much less trunking. Thankfully, they are still running the analog stuff parallel with the 800 digital as they work out the bugs.

 

[buddrousa]

You can not track trbo trunking but you can hear each frequency on a SDR as long as encryption is not used.

 

[ki4gyw]

I hear some people are carrying Tait DMR Radios over there.

 

[buddrousa]

They are a little far from me to listen to.

 

[tbzep]

I hear some people are carrying Tait DMR Radios over there.

I will know after the 18th when CCVFD officers trade in our analog hand helds for digitals. I figure we will get the same stuff the sheriff dept. is already using.

 

[INDY72]

Fire Officers may get radios with as many options as the SO, but regular Firefighters won't. But on the plus side, they probably will be in the loverly bright yellow housings we have all come to know and love right?

 

[tbzep]

Fire Officers may get radios with as many options as the SO, but regular Firefighters won't. But on the plus side, they probably will be in the loverly bright yellow housings we have all come to know and love right?

Hopefully no yellow, but I won't know until next Saturday. Right now the CCVFD is using Kenwood TK-2312, which is a horrible radio. It can barely be heard at full volume when you are anywhere outside of a quiet room. There is no keypad lock, and buttons are so easy to push that something gets changed almost every time you touch the darn things. HFD is using Motorola HT1250 and a few Vertex Standards. No button lockouts on the Motorola either, but it works better than the Kenwood. I haven't personally looked at any of the Vertex radios. AFIK, Huntingdon fire, police, and public utilities, don't plan to move to 800mhz anytime soon. Haven't heard McKenzie's plans. Carroll County Electric has been digital a few years, but still on their original UHF frequency.

 

[ka4bni]

Under a new FCC application (File Number 0006837731) issued yesterday, 11-Jun-2015, looks like Carroll County is planning a new five-site 800Mhz trunked system, with emission designators indicating a DMR/Mototrbo format.

At Huntington, 966 Lexington Street:
858.2375
857.2375
856.2375

At McKenzie, 116 Cedar Street
858.0125
856.0125
854.0125

At Trezevant, on Harpor Street
858.7375
857.7375
856.7375

At Bruceton, 217 Cheatham Street
858.0375
857.0375
856.0375

At Cedar Grove, on Highway 70S
858.0625
856.0625
854.0625

Talked with the Sheriff over there last week. The system is in place and operational with the Sheriff's Dept on it now. A five site Tait DMR trunked system. The McKenzie site is not yet operational, but others are.
You can monitor it using DSD+ on a discriminator tapped scanner. It appears the Sheriff's dispatch talk group is un-encrpyted as of now.
They are still multicasting the new digital system with their old 460.250 analog repeater in Huntingdon for THP and others. No other departments, other than county groups, will be on it as of now according to the Sheriff.

 

[tbzep]

Talked with the Sheriff over there last week. The system is in place and operational with the Sheriff's Dept on it now. A five site Tait DMR trunked system. The McKenzie site is not yet operational, but others are.
You can monitor it using DSD+ on a discriminator tapped scanner. It appears the Sheriff's dispatch talk group is un-encrpyted as of now.
They are still multicasting the new digital system with their old 460.250 analog repeater in Huntingdon for THP and others. No other departments, other than county groups, will be on it as of now according to the Sheriff.

Carroll County Fire is doing the same but has waited for the sheriff dept to work out the bugs. Right now only the county chief and EMA director have been using 800mhz, working out our own issues before switching. We have had 800Mhz mobiles in my district's apparatus for several months, but have been instructed to use VHF until the switch. When the county chief transmits on 800Mhz, it is easy to hear that he is on the new system even though I'm hearing it on our old analog VHF frequency. Sometimes he or the deputies transmit on 800Mhz while their VHF radios are turned up and we hear a sound from the VHF multicast resembling heavily reverbed trucker CB's. That's kinda cool considering the ear piercing feedback we get when we key up with a mobile and hand held near each other on the same frequency.

Edit: Just ran down to the station to look at the 800Mhz mobile. It's a Tait TM9300.

 

[ki4gyw]

Monitored it today a bit

Group call; TG=14192 SO or HPD Traffic.
Group call; TG=2032
Group call; TG=2041

 

[tbzep]

First chance I've had to sit down in front of the computer for a while. To go along with the TM9300 mobiles in our apparatus, we were issued TP9300 portables. Our radios are identical to the sheriff dept. This will be the first waterproof radio we've ever been issued. Go figure.

 

[FARMER522]

How many different channels or talk groups are in your new radios?

 

[buddrousa]

The way the DMR works it looks like 5 sites with 6 channels per site. Unknown how many and what talkgroups they have.

 

[ki4gyw]

Max is 500,000 Talkgroups, 500,000 subs.

 

[buddrousa]

Has anyone worked out the LNC's for the Carroll County DMR 5 site system?