Imperial War Museum Duxford upgrades to VoIP Visitors to Imperial War Museum (IWM) Duxford enjoy the heritage and tradition of this Second World War airfield. But behind the scenes, the ground-to-air-infrastructure is now built around a 21st Century solution from Northrop Grumman. The challenge for IWM Duxford Northrop Grumman has supplied and maintained ground-to-air equipment for IWM Duxford for many years. However, one component of the control tower system was an analogue voice switch provided by another company. This voice switch had been in place for many years and was nearing the end of its usable lifetime. Although it still worked perfectly, it was clear that soon it would be impossible for anyone to guarantee

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