Dortronics announces an informative session designed to provide resellers with the opportunity to explore and compare the various types of door interlocking systems, mantraps, sally ports and cleanroom air locks, and their applications. The course, Door Interlocks: Applications and System Design, reviews the various types of door interlocks, mantraps, sally ports and their applications as well as discusses the different types of interlock controls and the accessories required for a fully functional system.