People still use fax?? I mean, take a look at some of the fax applications on the smart phone. You can 'fax' a file over using the application, and a file on the phone rather than use a fax machine.
The at&t wireless base will route the 911 calls based on the 'automatic location'
https://www.att.com/media/att/2012/support/pdf/Quick_Start_guide.pdf
You can port your current number to the wireless base, pay like 20 bucks a month, and it should still support 911. It has battery backup, so if the electric goes out, you can still use it (I think a few hours of talking, and several days in standby mode), It has two phone jackes, so you can put in a wireless base for a bunch of wireless stations, and one of those wired phones for when the electric is out.