I used GOIP to send SMS from my application. Sometime, client call to this phone number but they cannot connect because I didn't config Income Call on GOIP. Is it possible to connect Zoiper application (Android) to GOIP without Call Center Gateway?
http://www.hybertone.com/en/pro_detail.asp?proid=10 https://play.google.com/store/apps/details?id=com.zoiper.android.app&hl=en&gl=US
Thanks,