Computer Help and Support

Assuming your Panasonic phone is a normal wired or cordless POTS phone (plane old telephone service), and not a native VoIP phone, then there really is nothing that would "reset" your phone when you reset your cable modem.

So my advice ... the next time it fails:

1) power cycle and/or replug in your phone first. See if that restores service (I would be pretty darn surprised...).

2) check to see if your internet access has also gone out. I.e. assuming your cable modem provides WiFi, connect to your WiFi with your cell phone and/or a computer and see if the internet is working. On your cell phone you might need to turn off "data" access over the cell network to be sure your network connections are using WiFi. Otherwise they could be trying to use WiFi, failing, and then switching back to data over cellular without your noticing.

3) see if you can make outgoing calls from your phone.

4) and of course, see if trying a different phone works before resetting the modem.

And I'll second the motion about having a small UPS to keep the power to the cable modem cleaner. A lot of gear like this gets confused with power glitches. Of course, it might not help you at all depending on the root cause of your outages.

My mother has had similar problems. Every time her (DSL) Internet goes down, she loses her VoIP phone access as well. She had no idea. Some sales person talked her into VoIP without her realizing she was giving up her landline.

Good luck!