When we had the three hurricanes in one year, the hardwired phone worked for about 3-4 days until the batteries died in the fiber2copper box across the street. Fiber runs from there to the central office about 10 miles away. The DSL internet connection ran a few hours longer. The DSL/fiber modems must be on a different set of batteries.
Along about the 4th day, Bellsouth managed to get a portable generator hooked up to the box. Of course, the mains power came back on two hours later.
There were obviously not enough back up generators for the cell towers as the phones all died quickly and didn't work in our area until the power came back on. One result of these hurricanes is that Florida now requires gas stations near evacuation routes to have generators. Most of the grocery stores have them too. I guess throwing out tons of food doesn't help the bottom line.
I would be leary of a phone that required AC to run...it can and will go away.
I live within a mile of all the TV transmission towers in Orlando. Combine all this RF energy with whatever else is emitting on there jams any wireless phone I have tried to use. It doesn't help internet wireless either.
Most of the VOIP type phones are simplex...not duplex like the old twisted pair phones, so they don't sound quite right. Any stray noise causes the system to try reversing the line direction which causes the dropped words. I know CDMA (Verison/Sprint) cell phones are this way too....not sure about GSM (Singular) or others. This gives the cell companies twice the number of channels in the same frequency space (think money).
Sorry....probably TMI.
Jim
