This manual provides detailed instructions on installing, operating, and maintaining the Federal Signal DC DCB, DC DCFCB, and DC DCFCTB Siren Control Systems. Learn about the features, specifications, and troubleshooting tips for these battery-operated mechanical siren. Some games will require you to relaunch them before the item will be downloaded. This is legacy Federal Signal Control box or used on other sirens, this is used on STH-10's, STL-10's, SD-10's, Thunderbolt Series, 2T22's, 3T22's & 500 Series You need to sign in or create an account to do that. If. Siren Control Box: Browse our selection of siren control boxes that provide seamless operation of your audible warning systems. These signals are transmitted by dialing on private line signaling bells and lights or by the operation of. I have available one complete three phase Federal Sign and Signal control cabinet that was from an SD-10 Civil Defense installation. Contained inside the major enclosure is a Furnas three phase. The Signal Division, Federal Signal Corporation (Federal), warrants each new product to be free from defects in material and workmanship, under normal use and service, for a period of two years on parts replacement and one year on labor from the date of delivery to the first user-purchaser.