Up to 4 SIP accounts
One-touch speed dial, hotline
Redial, call return, auto answer, direct IP cal
Group listening, SMS, emergency cal
Set date time automatically or manually
RTCP-XR (RFC3611), VQ-RTCPXR (RFC6035)
Call hold, mute, DND
Call forward, call waiting, call transfer
5-way conference
Ring tone selection/provisioning
Dial plan per account
Action URL/URI