I have finished configure FreePBX with SIP trunk behind a firewall however I enabled SIP remote login for extensions outside of this client's office. So I am wondering if anyone has done this before, I can see there's an active Directory integration but I would prefer Google auth since my client is not using MS AD. I would appreciate any answer

Linphone - Apps on Google Play Linphone is an open source app offering free audio/video calls and text messaging. With Linphone, you can be reachable at any time, even if the app is closed, with a WiFi or 3G/4G internet connection. Linphone key features: * high definition audio and video calls * audio conference calls with various participants * pictures and file sharing * Linphone accounts reachable at any time, even if Google Voice - Wikipedia Google Voice is a telephone service that provides call forwarding and voicemail services, voice and text messaging, as well as U.S. and international call termination [when defined as?] for Google Account customers in the U.S., and for G Suite customers in Canada, Denmark, France, Netherlands, Portugal, Spain, Sweden, Switzerland, and the UK. The service was launched by Google on March 11 Google Voice VoIP Calls Will Be Live For Everyone by Next Jan 25, 2019

HT802 to connect home analog system to Google Voice that I

Oct 09, 2009

Free SIP/VoIP Client The app routes calls dialed from your phone's built-in contacts app to VoIP. In settings you can choose when to use VoIP and when to make standard phone calls, based on being

Apr 08, 2011 Session Initiation Protocol - Wikipedia