There are complexities in interconnecting agencies but more at the social layers than at the technology layers. The Simon Fraser University (SFU) Mobile Communications (MobComm) Truck was designed to patch a Regional Emergency Operations Centre (REOC), specifically the British Columbia Provincial REOC (termed as the PREOC) communicating through the Internet (TCP/IP) and public telephone lines (PSTN). The first-responder (e.g. forest firefighters) naturally communicate with Ultra High Frequency (UHF) radio sets.