l          Support SIP and correlative RFCs

l          Support Voice gain settings, VAD, CNG

l          Full duplex hands-free speakerphone

l          Support G.168 and hands-free can support 96ms, hand free speaker phone

l          NAT transverse: support STUN client

l          Support SIP domain, SIP authentication , DNS name of server, P2P/IP call

l          Support 2 SIP lines

l          Support SIP Info, DTMF relay, RFC2833

l          Support call forward/ transfer/ holding/ waiting/ 3 way talking/ paging and intercom/ pick up/ Join call/ click to dial/ call park

l          Flexible dial map, hotline, empty calling reject, black list for reject authenticated call, limit call,

l          No disturb, called ID

l          Support phonebook 500 records

l          Incoming calls/ outgoing calls/ Missing calls, support 100 records

l          Support DHCP server on LAN

l          Support VLAN

l          Support DMZ

l          Support conference and voice record on SIP server

l          Support IAX2

l          Support  SRTP

l          Support NAT/NAPT

l          Support DHCP client on WAN

l          QoS with diffServ

l          Support Upgrade firmware through HTTP,FTP, TFTP, POST mode

l          Support Auto-Provisioning

l          Support system log