Phone Features: Call forward/ Caller ID Call transfer (blind/attended) Call holding/waiting Flexible dial map Empty calling no. reject service Black list/ White list BLF/ No disturb/ Speed dial/ SMS 4 line keys defined as multi line with screen display, or used as SIP line keys Softkeys/ Function keys programmable 8 DSS keys IAX2 line key SIP authentication (none, basic, MD5) Phonebook 500 records 9 kinds of ring type and 5 user-defined music ring Incoming calls /outgoing calls /missing calls(100 records for each). Advanced Features: XML phonebook/browser Code synchronization via IP PBX/IMS Click to dial via web phone book Action URL/Active URI Voice codec setting for each SIP line Hands-free headset ringing choice Signal tone parameters customized Voice codec setting for each SIP line Keypad lock, and emergency call during the keypad lock. Ring play via headset or speaker setting Code synchronization via IP PBX/IMS Click to dial via web phone book/ Group listening IP Phone System Integration: Conference call park Call pickup Paging and intercom Redial and unredial Click to dial Secondary dialing automatically CLIR (reject the anonymous call) CLIP (make a call with anonymous) Dial without register Codec & Voice: Wideband codec: G.722.1 Narrowband codec: G.711a/u, G.723.1 high/low, G.729a/b, G.726 Echo cancellation: G.168 Compliance in LEC, additional acoustic echo cancellation(AEC) can reach 96ms max filter length in hands-free mode Full duplex hands-free speakerphone Voice Gain Setting, VAD, CNG EXT DSS consoles with 5max. Network Features: WAN/LAN: 10/100M Ethernet ports Route and Bridge mode. Bridge working as hub(optional) PPPoE for xDSL DTMF: SIP info, DTMF Relay,RFC2833 SIP 2.0 (RFC3261) and correlative RFCs VLAN(voice vlan/data vlan)/ 802.1 Basic NAT and NAPT NAT transverse: STUN client DHCP client on WAN DHCP server on LAN Peer to Peer Security: Main DNS and secondary DNS server. DNS Relay, SNTP Client, Firewall VPN (L2TP/OPENVPN) and DMZ QoS with DiffServ Network tools in telnet server: including ping, trace route, telnet client Maintenance and Management: Web, telnet and keypad management with different account right HTTP, FTP or TFTP server Auto provisioning: DHCP option66 Telnet remote management/upload/download setting file Safe mode provide reliability Auto Provisioning via HTTPS/FTPS(optional) TR-069(optional)/ Syslog