VoIP SIP SDK / Voice Video SDK

Voice and video SDK, SIP VoIP development main features: direct, back, peer voice calls, video calls, synchronize your phone contacts, integrated call recording, support the SIP protocol, voice coding support 711,729,723; dockable client systems ( VOS, ASTGO, FREESWITCH etc.); support Alipay, CUP, recharge cards, recharge; also fusion IM instant messaging functions, but also the development of value-added functions according to the needs of customers, such as sharing polite (microblogging, micro letter, QQ space, people People nets and other social platforms), daily attendance, etc. is recommended third-party applications; professional artists who create beautiful UI interface.