The focus of the thesis is on the characterizing Radio over IP voice and signalling delay, availability and voice quality by deploying Radio over IP (RoIP) System-of-Systems solution over large distances. Sys-tem-of-Systems RoIP solution interfaces various mobile radio systems over multiple third party Wide Area Networks (WANs) based on Multiprotocol Label Switching Internet Protocol (MPLS IP) links to enable different departments such as Police, Military, Fire, Ambulance, Oil, Correctional Services, For-estry, Mining and etc. to communicate using their existing mobile radios.