Kerio Operator Softphone is a software-based phone client that lets you make and receive calls on your Android mobile device from your office phone system. Kerio Operator Softphone is designed to work with Kerio Operator IP PBX or any other SIP based VoIP service.

NOTE: Kerio Operator Softphone s auto-provisioning (auto-configuration) with Kerio Operator SIP server but can be configured manually to operate with any SIP based VoIP server.

Main features
* Excellent voice quality
* High security with call encryption
* Multitasking for operation in background
* Multiple languages - English, French, Spanish, Russian, Chinese (Simplified and Traditional), Japanese, Korean

Telephony features
* for up to 4 s on any SIP-compliant server (Automatic provisioning with Kerio Operator)
* Integrate s from your phone's native s directory
* Call display and voice-mail indicator
* Transfer to speakerphone, mute and hold functionality
* Call history
* Ringtones and avatars
* Dial plan
* Multiple call - swap between two active calls, merge and split calls, transfer calls
* DTMF via RFC 2833, SIP INFO and in-band
* VPN
* Automatic codec selection for best call quality
* ed codecs: G.711 a/u, G.722 (HD), iLBC, GSM

Advanced features
* Global IP
* STUN & ICE
* Noise reduction, echo cancellation and VAD (Voice Activation Detection)
* Quality of Service
* Security and call encryption via TLS and SRTP
* DNS SRV record look-up
* Call quality statistics

ed accessories
* Headset with microphone - wired or Bluetooth
* Headphones (without microphone) - device's built-in microphone is used

Please note that using Kerio Operator Softphone as a default dialer may interfere with dialing 911 emergency services (112 emergency services in Europe).