ABTO Software VoIP SIP SDK for iPhone and iPad will help you to quickly build a custom softphone app for iOS.
Operating system:
- Mac OS X.
Development environments:
- VOIP SIP SDK for iPhone on objective-C (Xcode);
- VOIP SIP SDK for iPhone on Swift.
iOS versions:
- VoIP SIP SDK for iOS 18;
- VoIP SIP SDK for iOS 17;
- VoIP SIP SDK for iOS 16;
- VoIP SIP SDK for iOS 15;
- VoIP SIP SDK for iOS 14;
- VoIP SIP SDK for iOS 13;
- VoIP SIP SDK for iOS 12;
Features:
- CallKit support;
- PushKit support;
- Conference call
- stable background mode until iOS 16, PushKit+CallKit support for operation in background on newer iOS versions;
- ability to use SDK as dynamic or static library
- MWI support
- SIP/RTP;
- STUN, NAT64;
- IPv4/IPv6 support;
- most SIP servers support;
- ICE;
- TURN;
- UDP/TCP support
- seamless network change;
- voice and video calls;
- transfer calls;
- calls recording;
- ability to route audio to Bluetooth headset;
- IM;
- secure connection via SRTP+TLS, ZRTP;
- changing camera orientation;
- switching between multiple cameras.
Available codecs:
- H.263;
- H.263+;
- H.264;
- VP8;
- G.711-ALaw;
- G.711-muLaw;
- G.729;
- OPUS;
- Speex;
- Theora;
- GSM;
- SILK;
- G722.1;
- G723.1.