Grandstream Wave is a free softphone app which supports 2-way video calls based on SIP & H.264 video codec. Grandstream Wave also supports advanced SIP telephony features including call transfer, LDAP phonebook integration and more. With Grandstream Wave, business and residential users always have access to their SIP lines and can easily keep in touch with business or personal contacts without using expensive cellular data plans.
  
Features
Supports G.711µ/a, G.722 (HD-audio), G.726-32, GSM, iLBC, Opus and Speex codecs
Security features include SIP over TLS and 128/256-bit SRTP
Up to 6-way audio conference, and 24 virtual BLF keys
Supports 6 SIP accounts
Native integration with mobile devices including contact, call history and ringtones
Enterprise features including IP PBX integration, BLF, call transfer/pickup, call recording with UCM, LDAP
Automatic call forwarding based on time and location rules
Full integration with Grandstream’s UCM-series of IP PBXs, including creation of QR code for automatic provisioning
Voice channel switching between Bluetooth, earphone, speakerphone & 3.5mm headset
Supports 2-way video calls based on SIP & H.264 video codec
Specification
Network : Supports 2G/3G/4G or Wi-Fi smart connection
Display : 480×800 resolution or above
Camera : Support forward or rear-facing cameras
Bluetooth : Yes, supports mobile device’s bluetooth
Voice Codecs and Capabilities : G.711μ/a, G.722 (wide-band), G.726-32, iLBC, Opus, GSM
Video Codecs and Capabilities : H.264, video resolution up to 720p HD
DTMF : In audio, RFC2833, SIP INFO
Audio Quality : Full-duplex speaker, AEC, AGC, Noise Reduction, PLC, Adaptive JIB
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