Call functions like mute, conference, hold, transfer, and call recording should be available. These options should be visible during a call. When you transfer a call, it will ask for your permission to move the call to another person first.
Echo cancellation and noise suppression
Voicemail messages and missed calls notifications
Contact integration from LDAP, Outlook, or CSV
Low resource consumption
Supports SIP, XMPP, and IAX accounts
TLS, SRTP, and ZRTP encryption
Voice Codecs: G.729 (paid), a-law, U-law, GSM, iLBC 20 and 30, Speex Narrow
Voice Codecs: H264 (paid), VP8
RAW SIP technology, not WebRTC.
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