CISCO Configuration fix

Have a SIP Device that needs UDP/TCP 5060 to 5061 & UDP 49152 to 65535 ports opened on router. On VPN cannot access routers of three locations from all the three locations only on one location routers are accessible need to fix this should be accessible on all locations. Create QOS Policies on Managed switch and Cisco Router to priorities traffic between three SIP devices on three different office locations. Priorities traffic between set of IP's Router A(Location A) to Router B (Location B) to Router C (Location C)