Longmont Area, Fire and EMS scanning

I see Longmont, as well as Mountain View Fire are listed with both VHF Freq's and DTRS talkgroups



Which is the best way to monitor them?

I've got a new BCD396XT and I"m still learning - in spite of the 273 page manual ;-)



I'm hearing Longmont POLICE just fine on their VHF frequencies but I have yet to hear any Fire or EMS traffic.



When I look at the VHF page in the database it says they're on DTRS

When I go the Boulder County section for the DTRS it states that they're still on VHF

??????