Twin State Mutual Aid

Twin State Mutual Aid

Twin State is Dispatched by Grafton County Sheriff's office in Haverhill,NH
They dispatch Northern Grafton County, and some Vermont Fire Departments
The Unit ID's use the name of their towns then say their unit type (which is a letter) and then their number

Table of contents -
Contents 1 Radio System 2 Fixed Links 3 Member Communities

Radio System

Frequency	Type	Tone	Notes	Confirmation/ReConfirmation
154.4000	S	136.5	Ch.1 - Dispatch	2024.09.29 GraniteScanner
			Ch.2 - Local Frequency	(See specific town for confirmation).
			Ch.3 - Local Frequency	(See specific town for confirmation).
154.2950	S	136.5	Ch.4 - Fireground	2021.12.27 JBolduc
154.2800	S	136.5	Ch.5 - Statewide Fireground
154.2350		136.5	Ch.6 - Fireground
154.1600		173.8	Ch.7 - Fireground
155.6775	R		Now Expired Vermont transmit site

Frequency	Type	Tone	Notes	Confirmation/ReConfirmation
451.3625	F	114.8	Downlink (154.4000) from Remote RX site (?)	2014.06.22 LTE4NFD
453.3625	F	141.3	Downlink (154.4000) from Remote RX site (Mann Hill) back to Grafton SO	2014.07.12 ecps92
451.7500	F		Downlink (154.4000) from Remote RX Site (Haverhill) back to Grafton SO
451.7500	F		Downlink (154.4000) from Remote RX Site (West Newbury VT) back to Grafton SO
458.2625	F	D606	Downlink (154.4000) from Remote RX Site (Franconia) back to Grafton SO	2019.10.21 ecps92
458.6375	F	D606	Downlink (154.4000) from Remote RX Site (Haverhill) back to Grafton SO	2019.10.21 ecps92
465.3625	F		Downlink (?? Mhz) from Remote RX Site (West Newbury VT) back to Grafton SO