smallest trunked system?

[kb0rpj]

Im not sure this is the best group to start but I will try here.

What is the smallest county in the country that uses a stand alone trunked system of any variety (not part of a statewide system)

Ellis county kansas is 29,000 and runs a mot system

Meade County KS is 4,300 and runs an LTR Trunked system

is there any counties between those two that run there own stand alone system?

 

[Project25_MASTR]

It honestly depends on your definition of the term trunking.

LTR is capable as operating on a single channel.

DMR (such as Hytera XPT, Motorola Capacity Plus, Motorola Connect Plus and all Tier III solutions) are capable of operating as a single channel trunking system.

Over the last two decades several manufacturers have manufactured P25 systems capable of operating as a single channel trunking system (though not part of the P25 spec) such as Motorola and Icom.

 

[kb0rpj]

I guess any system.
I was refering to county size not the system size.

Other than coverage it seems like small counties having trunked in any flavor is overkill or am i wrong?


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[jonwienke]

Some businesses have trunked systems. It's not overkill.

 

[IAmSixNine]

Your correct, its overkill.
Local city outside of Dallas has a 3 channel trunked system. PD and FD have 3 talk groups each.
Yet its almost never used. LOL they are just so slow and dont have much traffic. Such overkill.

 

[kf5bti]

We have a Motorola Type II at work for use in the warehouse. 8ch, antennas are about 50' up and we only need coverage for about 0.5mi radius. Primarily use MTS2000 HT's.

 

[Project25_MASTR]

I guess any system.
I was refering to county size not the system size.

Other than coverage it seems like small counties having trunked in any flavor is overkill or am i wrong?


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Depends on the amount of traffic and what all it is being used for. For example, City of Austin owns a system that covers nearly 1/4 of the state of Texas.

If a smaller county, is trunking overkill? Depends on how you look at it. There comes a point where having a pool of channels that can be used on demand is more cost effective than everyone having their own individual channels.

 

[jonwienke]

There comes a point where having a pool of channels that can be used on demand is more cost effective than everyone having their own individual channels.

Which is the whole point of a trunked system. Having one shared set of infrastructure is also cheaper than everyone having their own transmitter, backup generator, antenna tower, and all the other stuff that goes with having a radio repeater system. A trunked system also makes it easier for the users of the system to talk to each other should the need arise, versus everyone having their own repeater and frequency.

 

[INDY72]

It honestly depends on your definition of the term trunking.

LTR is capable as operating on a single channel.

DMR (such as Hytera XPT, Motorola Capacity Plus, Motorola Connect Plus and all Tier III solutions) are capable of operating as a single channel trunking system.

Over the last two decades several manufacturers have manufactured P25 systems capable of operating as a single channel trunking system (though not part of the P25 spec) such as Motorola and Icom.

And when it was still in production... GE/Ericsson Tyco M/A Com finally Harris EDACS had single frequency systems also. (A couple still in use maybe?)

 

[Project25_MASTR]

Which is the whole point of a trunked system. Having one shared set of infrastructure is also cheaper than everyone having their own transmitter, backup generator, antenna tower, and all the other stuff that goes with having a radio repeater system. A trunked system also makes it easier for the users of the system to talk to each other should the need arise, versus everyone having their own repeater and frequency.

Especially practical when only one or two users are heavy users of the system.

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[lmrtek]

Motorola sales reps have jumped in the back pockets of county commissioners and 911 directors everywhere so that's why you see podunk towns and counties with massive money pit radio systems.
........
I've seen it happen time and time again.
........
County commissioners and 911 directors are clueless as to how RF works and what they REALLY need but they ALL understand how bribes work

 

[Anderegg]

Back in the 90's in San Diego County, the cities of Escondido and National City had Smatnet trunking systems on the roof's of their police stations. The cities were separated by about 40 miles, and shared the same set of frequencies. If you were halwfay between the cities, you would hear the control channel of one covering the voice channel of the other system when a talkgroup would be granted! :-D

Paul

 

[N4GIX]

Thirty years ago I installed a five-channel EF Johnson trunking system for the King Ranch in south Texas. Since they had a large part of the ranch much further south, the 550' tower was located roughly half-way between Kingsville and Brownsville, Texas.

This allowed them to provide both dispatch for all vehicles, and phone connect for supervisory personnel.

 

[RFI-EMI-GUY]

We have a Motorola Type II at work for use in the warehouse. 8ch, antennas are about 50' up and we only need coverage for about 0.5mi radius. Primarily use MTS2000 HT's.

800 MHz?

 

[Project25_MASTR]

800 MHz?

Still a few SmartNet systems still running around here locally. A couple of Type I and at least two Type II systems. I'm technically maintaining a Startsite system that's running on 3 Quantros…but only has two customers on it currently (everyone else has migrated to either Capacity Plus or Connect Plus). The Type II systems are owned by SMRs (who built in the 90's and are still operating on the 6809's and MSF5000's) and the Type I systems were put in somewhere between the late 80's and early 90's for manufacturing facilities.

Hardest part about Type I is the list of subscribers that will run on it is slowly running out (and spare parts for the controller have already hit shelf life).

 

[RFI-EMI-GUY]

Still a few SmartNet systems still running around here locally. A couple of Type I and at least two Type II systems. I'm technically maintaining a Startsite system that's running on 3 Quantros…but only has two customers on it currently (everyone else has migrated to either Capacity Plus or Connect Plus). The Type II systems are owned by SMRs (who built in the 90's and are still operating on the 6809's and MSF5000's) and the Type I systems were put in somewhere between the late 80's and early 90's for manufacturing facilities.

Hardest part about Type I is the list of subscribers that will run on it is slowly running out (and spare parts for the controller have already hit shelf life).

I am wondering how one licenses a trunked system for a warehouse with a 0.5 Mile radius. Maybe an operation like GM, or UPS or FED X but, you need 75-100 radios per channel loading in 800/900 MHz and the other bands have interference criteria that make centralized trunking a licensing nightmare. That being said, an internal system might fly.

Indeed, Motorola had a small 5 channel controller called Start Site, the size of a desk top control station that could probably be maintained on a small budget and with e-bay sourced spares. One would have to be saavy to program it.

I got my feet wet in the era of Type I STX in Miami. STX was a fantastic radio. The factory engineers quietly revealed to me that Type 1 was not going to work out for the customer's future growth and interop and sure enough, the Type 2 upgrade controllers started being shipped out, for that reason and faster access time. They ran with Type 1 fleet map for quite a while. Size Codes anyone? Buehler? Nobody?