DFollowing H.323 version 4 standard(ET-747H) or RFC-3261SIP standard(ET-747S) DSupport Low Bit Rate codecs DPassing through NAT devices DProvide call history DAdvanced Digital Signal Processing (DSP) technology to ensure superior audio quality DVolume Adjustment : Can adjust both incoming and outgoing voice volume. DPhone book: 50 sets. DSpeed Dial : 10 speed dial keys. DBuilt-in switch function DDynamic IP support( DHCP and PPPoE) DSupport TCP/UDP/IP, RTP/RTCP, HTTP, ICMP, ARP, DNS, DHCP, NTP/SNTP, FTP, @PPPoE protocols.
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