Hello, csipsimple is a VoIP app that connects to a SIP server like Asterisk-PBX.
I use RasPBX as my Asterisk-PBX. It's free and uses a Raspberry PI. http://www.raspberry-asterisk.org/
I also use AllStarLink's Dial OS for VoIP and RoIP. https://allstarlink.org/
If you want a hosted PBX try PBXes. https://www4.pbxes.com/
I don't use csipsimple. On some android phones SIP VoIP is built in. Click here to setup.
If your phone doesn't have it built in I would use Zoiper lite. iPhone Android Windows Mac Linux. If you have a Google Account. You can use Google Hangouts dialer to make free calls.
But for ECOMs that's a whole other ball of Wax. I'll let some else answer that one.
I use RasPBX as my Asterisk-PBX. It's free and uses a Raspberry PI. http://www.raspberry-asterisk.org/
I also use AllStarLink's Dial OS for VoIP and RoIP. https://allstarlink.org/
If you want a hosted PBX try PBXes. https://www4.pbxes.com/
I don't use csipsimple. On some android phones SIP VoIP is built in. Click here to setup.
If your phone doesn't have it built in I would use Zoiper lite. iPhone Android Windows Mac Linux. If you have a Google Account. You can use Google Hangouts dialer to make free calls.
But for ECOMs that's a whole other ball of Wax. I'll let some else answer that one.
David
KE6UPI