Grandstream Networks has released a free application for SIP telephony

Supports integration of up to 6 SIP accounts, voice conference of up to 6 subscribers, and allows users to track PBXs with speed dialing using up to 24 virtual BLF keys. Grandstream Wave supports advanced SIP telephony features, including call transfer, shared call appearance (SCA), call recording, LDAP phonebook integration, etc.

Main characteristics:

• Android 4.0+ support (and soon iOS 5.0+)
• Reliable security features, including SIP over TLS and 128 or 256-bit SRTP
• Support 6 SIP accounts and audio conferencing of up to 6 subscribers, and 24 virtual BLF keys
• Own integration with mobile devices, with contacts, call history and ringtones.
• Business functions, including integration with IP-PBX, BLF / SCA, call transfer / capture, call recording, LDAP
• Automatic call redirection (according to the rules of time and geotargeting)
• NAT traceability capabilities, including automatic NAT detection, STUN / ICE and UPnP
• Support G.711, G.726, G.722, iLBC, Opus, Speex, GSM
• Automatic deployment, including XML deployment and 2-D barcode scanning
• Fully customizable look and feel

App on Google Play

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