Key Features: �� Support 5 Navigation/menu/volume Keys, 13 Dedicated Function Keys For: HOLD, SPEAKERPHONE, MUTE, TRANSFER, CONFERENCE,and MESSAGE(with Message Indicator),6 Speedkeys. �� Support SIP 2.0 (RFC 3261), T ...Read More

Support H.323 V4,compatible With Most H.323 V1-v4 System And Devices Built In H.323 Proxy Support To Pass NAT Support MGCP RFC2705 Support SIP RFC3261 Support IAX2 Support Net2phone Private Protocol Fast Start And H.245 Tu ...Read More

Performance And Features Support SIP,IAX2,H323 Protocol NAT, Firewall. It Can Register Two SIP Account And One IAX2 Account In The Same Time. All There 3 Account Can Be Used As Called Anytime,and For The Caller,it Can Be Slelect ...Read More

Performance And Features Support SIP,IAX2,H323 Protocol NAT, Firewall. It Can Register Two SIP Account And One IAX2 Account In The Same Time. All There 3 Account Can Be Used As Called Anytime,and For The Caller,it Can Be Slelect ...Read More