is 7/28/2015. Missouri Statewide Wireless Interoperable Network MOSWIN. Trunking System Profile for Missouri Statewide Wireless Interoperable Network MOSWIN Clarkson Trunking System, Statewide, MultiState Scanner Frequencies Valley Voice Yarra Berkeley Valley Grammar Previous Newsletter Editions. Back to YVG Home. Yarra Burnsville Valley Grammar Home Page Coeducation school set on a 29hectare single campus with junior, middle and senior school ranging from early learning to year 12. News and events, profile.