Support two SIP servers running at the same time
Redundancy SIP server support
NAT,Firewall
DHCP client and server
Support PPPoE (used for ADSL,cable modem connceting
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 Forwaard,Call Transfer,3-way conference calls
Call ID display
DND (Do Not Disturb),Black List,Limit List
Reverse polarity
Voice prompt
