I have a Norstar CICS phone system with a Tripp
I spent 13 years on the West coast of Florida, Tampa/ST Petersburg area. Also known for being the Lightning capital of the world. As such, became quite familiar with the effect fluctuating power levels had on various equipment.
During a Tech show, the power went out and we continued our demo's for over six hours with two Tripp Lite UPS's. After that, I swore by the Tripp Lite line and eventually became a dealer.
Spikes and outages were handled with flying colors. Their only short fall was line conditioning.
When a sudden draw causes a voltage drop that approaches 'Brownout' conditions, the UPS actuation threshold didn't always get reached. For some systems, that threshold was much more critical. When these were ID'ed, the remedy was a 'Line Conditioner'.
Think of it as a UPS thats always on, always charging. It outputs a regulated constant flow/ No spikes, no dips.
I feel this is your solution. However, proving it would require one being installed.
Perhaps, asking the utility company if they could check the power being supplied to the phone system for spikes/dips would be proof enough. They were happy to do this in Tampa.
Hope this helps,
on Dec 05, 2009