Let me clear up what's going on in Catawba County......
EMS, Rescue, County Fire, Hickory Fire, Conover PD, and Sheriff Dept established VHF to VIPER patches in 2009 in anticipation of a transition to VIPER. Main dispatch channels on VHF for all these agencies were patched to their corresponding VIPER TG's using an ACU 1000.
EMS switched to VIPER using portables only in December 2009. Mobiles were gradually added to the fleet over 2009-2010 with the bulk of them being installed in October. I'm overseeing the final mobile install today, then we'll be 100% VIPER.
County Fire, Hickory Fire, and Rescue Squads are receiving their radios today at a radio distribution/training meeting. These agencies will be using portables only although I think some of them will be buying mobiles. I don't remember the final number of radios bought but it was in the hundreds; they were purchased with an Assistance to Firefighters Grant that we were awarded in 2010.
Catawba County Sheriffs Office switched to VIPER on Wednesday using radios purchased on a seperate grant. They no longer have a VHF patch, they are operating strictly on VIPER.
The old Sheriffs Department VHF channel is now patched to 49824 c2a D CATLEDISP Catawba County LE Dispatch Law Dispatch and the law enforcement agencies in the towns and smaller cities are still using this channel.
I haven't been to the meeting yet so I'm not sure of all of the details of the final transition.
Hope this helps