PC from/to Android voice communication without Internet I want to call my PC using my Android phone (and vice versa) without internet. PC to Android or Android to PC, not just Android to Android. I think it is possible, but not sure if there is a program like that.

What apps do I need to install both on PC and Android phone?
OK, just use Linphone. That's the app the old answer recommended, as you can just use the same program on Win/OSX/Linux/Android/iOS. You don't need internet, but you do still need to have IP connectivity between the devices (if one can ping the other then you're good to go).