Harris P25 system

[NCFire11]

Can anyone explain what kind of system that Harris will be installing into our county?

It will be a digital system i believe on the 800 band, but I am not sure. I've also heard that we will stay on VHF frequencies.

My question is- how are we going to keep our minitor V narrowband pagers on a digital system? The Minitor V is not a digital pager. I am thinking there will have to be Vhf digital to analog repeaters? or 800 digital to analog vhf?

We are getting full spectrum portable and mobile radios as part of the upgrade.

It will be a huge change from vhf analog conventional simplex channels.

 

[bezking]

You're correct that the Minitors aren't digital; there are no P25 compatible fire pagers on the market.

What they will probably end up doing is keeping the pager dispatches on an Analog VHF frequency. If there is a need for these transmissions to be heard on the TRS as well, they would probably use a VHF to 800 bridge. Doing it the other way around (Digital-to-analog) would be terrible from a performance perspective because the P25 vocoder does a terrible job at tones (and, for that matter, anything that's not a human's voice).

 

[NCFire11]

so pretty much in our communications center, they will keep the current vhf consoles and just add the p25 console?

Will Motorola XTS radios work on this system?

 

[NCFire11]

oop found this:

Harris Corporation Awarded $9 Million Contract by Franklin County, North Carolina, to Upgrade Emergency Communications Network

 

[bezking]

so pretty much in our communications center, they will keep the current vhf consoles and just add the p25 console?

Will Motorola XTS radios work on this system?

I would imagine, but without knowing the specifics it's hard to say. The XTSs should work on that system...

 

[greenthumb]

A Motorola XTS will work on that system - it is a P25 system. Often times, in order to maintain compatibility with VHF fire pagers, they will multi-select dispatches on both the digital 800 MHz trunked system as well as the VHF analog repeater. However, while this is a technical option, whether or not it is implemented is another thing.

 

[NCFire11]

well in the article they mention that we will "keep our current analog pagers"

 

[NCFire11]

This is still in the early stages, tower sites are just starting to go up, one being about 1/4 mile from my house.

 

[funinvir]

Analog Pagers on P25

Your analog paging transmitters will be interfaced to the P25 system using their NetworkFirst Interoperability Gateway. Paging tones will be sent from dispatch using the ADPCM vocoder (32kbps) not the P25 IMBE vocoder so they will sound great (as will the voice quality). Unlike Motorola's MotoBridge product, NetworkFirst is fully integrated into their IP solution.