SIP, STUN, PPPOE
Key Features
•  Support two sip servers running at the same time.
•  Redundancy sip server support.
•  Support PPPoE, (used for ADSL, cable modem connecting).
•  Support major G7.xxx CODEC.
•  VAD, CNG.
•  G.165 compliant 16ms echo cancellation
•  E.164 dial plan and customized dial rules
•  Support Lifeline.
•  Hotline.
•  Call Forward, Call Transfer, 3-way conference calls
•  Call ID display
•  DND(Do Not Disturb),Black List, Limit List
•  Reverse polarity
•  Voice prompt