Bettertalk uses SIP protocol based for signalling.
Supports G729, PCMU, PCMA codecs.
Runs Behind NAT or private IP.
User Friendly Interface.
Auto Sync of Balance.
Real-Time Sip status messages.
Address book integration.
It has a very efficient implementation of jitter buffer to play voice smoothly.
Silent suppression and comfort noise generation has been used to reduce the bandwidth usage, and this makes the dialer more efficient in making VoIP calls.
Integrates with mobiles phonebook and auto detects (+) sign when contact is picked from phonebook.