An Industrial Public Address (PA) System from Armtel, Russia, is installed at IOCL Mathura Refinery for emergency communication. MainBoQ for the system is as follows:

• 1.) 2 DCN-Central Exchanges
• 2.) 3 Desktop DIS Call Stations with gooseneck microphone
• 3.) 3 Weatherproof DW Call Stations with additional 25W amplifiers + 25W weatherproof horn loudspeakers
• 4.) 49 explosion proof DW Ex Call Stations with additional 25W amplifiers + 25W explosion-proof horn loudspeakers
• 5.)25 explosion proof chamber loudspeakers 25W