It has been observed some problem in keypad.we installed the DX8100 series of CCtv system at ONGC offshore. we tried to solve the problem & restarted the the system. But,keypad was hanging repeatedly. so please suggest us forthe same.pls send soft copy of manuals to us. my name: Badrinarayan from Honeywell Automation(I) ltd.My mail ID: shripad.malagi@gmail.com