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If a UPS is still in sight for you, an "Online UPS" would be a good choice since the power comes from the battery and not directly from the line source.

Earl, I wanted to reiterate what MEP001 says above. You will definitely want an uninterruptable power supply system that offers "line conditioning" or "line filtering" if you are in fact having power fluctuations at the site enough to glitch keypad communications. From our conversation, I...

I am glad you got things working. I hope this is not an indicator that the computer is on its way out. Keep in mind that a computer in a well-kept environment lasts about 5-7 years and this can be a little less if it is kept in an environment that is not humidity and temperature controlled...

JMMustang, The computer beeping usually indicates that there is a hardware problem--this could include the motherboard, computer's power supply, hard drive, or other internal components like a TunnelWatch IO board or an internal PCI IO card. You can always contact technical support at DRB...