Grafton County P25 System

[Asmitty0010]

Looking for some information on GCSO's digital system.

I know they operate from varies repeater locations. When i look up their FCC page it only lists two freqs: 155.770 and 155.850. I do know that the Cannon Repeater's input is 155.850 with a NAC of 117. Looking for info for Tenny and Moose Mountain. How do they activate each repeater? Does it work like Troop F? (different NAC inputs for each) or does each repeater have its own input frequency?

Hope this makes since. I've wondered this for a long time, haha.

Alex

[ecps92]

Dispatch is via L/L or Microwave and yes Each Repeater has a different NAC
just like when they were Analog they had a common 136.5 Out tone, with a different
tone on the input

Originally Posted by Asmitty0010

Looking for some information on GCSO's digital system.

I know they operate from varies repeater locations. When i look up their FCC page it only lists two freqs: 155.770 and 155.850. I do know that the Cannon Repeater's input is 155.850 with a NAC of 117. Looking for info for Tenny and Moose Mountain. How do they activate each repeater? Does it work like Troop F? (different NAC inputs for each) or does each repeater have its own input frequency?

Hope this makes since. I've wondered this for a long time, haha.

Alex

[steele_lpd]

Alex...

Each transmitter uses the same in and out freqs... as well as the same out PL and NAC... The In PL and NAC is what's unique to each transmitter...

As mentioned, the outs are all the same 154.7700 - PL 136.5 - NAC 117

The inputs are as follows...
Cannon (A Repeater) - 155.8500 - PL 136.5 - NAC 117
Moose (B Repeater) - 155.8500 - PL 141.3 - NAC 517
Tenney (C Repeater) - 155.8500 - PL 156.7 - NAC 417

And despite what others think, GCSO still maintains and uses their analog system... If for some reason you need to call them on analog they will answer you (provided you tell them you're on analog - "Thornton 3 to Grafton on analog").

If you need anything else shoot me an email,
Paul

[skydmark1]

I've heard them on both analog and digital so I can back that up. Plenty or good traffic on there. I'm in Littleton, NH

[LPD7]

The analog works better from certain locations, sot they still utilize the system. Grafton also provides primary dispatch for some towns on the towns respective local frequency. Some of these towns still use analog entirely or partly. The dispatch center is in North Haverhill. Also Hanover dispatches some towns from their dispatch center on the west side of the county.