I currently don't use TOR and I have VoIP - a physical phone using a provider's VoIP service over my Internet connection. If I install TOR, will I still be able to make and receive phone calls with my VoIP phone? I am not concerned about the privacy of the phone calls, I just want to be able to use the phone. Thank you!
Yes you can use tor on any device you want and that should not interfere with others devices on network.
While you can router all devices to tor using your router is not recommended since it is not a guarantee of 100% anonymity and will slow down all your devices.
If your VoIP does not use encryption then you will only expose yourself even more and draw more attention since many tor exit nodes are actually controlled by the government , if your VoIP uses encryption then your communications are already safe and you don't need to use TOR.
Resuming TOR will not make your VoIP safer and can possibly only draw more attention on you , you should look for VoIP services that use know safe envryption methods for safe communication.