I was looking over your account and noted that your voice equipment does not have a battery installed. I can get a tech out to ensure that you have a proper battery installed to avoid this inconvenience in the future. Please send me a private message with your preferred contact information so I can schedule the tech to your site.
A battery is good but a backup is always a good idea. I use a series of screenshots to back up my modem. Just do Cntl-Alt-Printscreen and paste the clipboard into Paint then save as a png
In addition to all that, adding a UPS to supply AC power to all your communication gear is cheap compared to loss of business due to outage.