Air dispatching is done on VIPER with the occasional multi-select on the VHF frequency. Inbound patient reports are done on VHF 99.9% of the time.
Ground units are also dispatched on VIPER but flight watch also multi-selects across the Charlotte system. The only time you'll hear a helicopter on the Charlotte system is on a CMC LZ TG, they no longer dispatch on Charlotte's 800 system.
MCA has a TG on Palmetto 800 as well but your profile says you live in Statesville so that's more than likely irrelevant to you.