Hello,
Voicelink is a CT statewide Passport network created by Marcus. Looking at the operational area that Hunter covers it is likely they are on Voicelink. I have heard Ambulance and Limo services on the system so that could be Hunter.
http://www.voicelink.net/
Marcus' license for 461.7875 is in Trumbull CT. Other frequencies licensed at the site are 451.9875, 463.4375, 463.9375, and 464.4125. I do not have that frequency logged as being Passport. It is possible that those frequencies are Regular LTR as a Passport system can support Regular LTR as well.
The nearest Voicelink site to Trumbull is site 113 in New Haven using 463.6375, 463.9375, 464.3625, 464.6125, and 464.8625. Hunter is based in Meriden so likely they will be heard on Wolcott site 50 (451.0375, 451.2125, 452.9125,461.5875, and 464.7875) or Durham site 60 (451.9875, 452.4375, 463.8875, and 463.9125).
You have to scan a Passport system with a Scanner conventionally. It is possible to trunktrack but it requires a receiver with a discriminator tap, a low-pass filtered data slicer, a computer with LTRTrunk software, and a computer controllable receiver.
If you search this site using the keyword Passport there are a few threads about Passport and how to scan it conventionally.
73 Eric