Reliable Diesel Engineers [P] Ltd. Manufactures Microwave Transmission Rack for Telecommunication Industry. Reliable Diesel Engineers [P] Ltd. Is an ISO 9001:2000 received company. Microwave Transmission Rack for Telecommunication Industry is designed with designed 19 inch standard enclosures. Microwave Transmission Rack for Telecommunication Industry offers two special customized versions are 300mmD which has fixed side angles and the 600mmD "DEEP" Rack, which has removable side panels. These cabinets are generally of 1800 mm and 2200mm height overall.