- Grandstream next generation enterprise grade IP phone- 2 dual-color line keys (with 2 SIP accounts and up to 2 call appearances) 3 XML programmable context-sensitive soft keys 3-way conference- HD wideband audio superb full-duplex hands-free speakerphone with advanced acoustic echo cancellation and excellent double-talk performance- Automated personal information service (e.g. local weather etc) personalized music ring tone/ring back tone flexible customizable screen content & format using XML and advanced Web and enterprise applications integration (pending)- 180x60 pixel backlit graphical LCD display with up to 4 level grayscale- 2 dual-color line keys (with 2 SIP accounts and up to 2 all appearances) 3 XML programmable context-sensitive soft keys 3-way conference- HD wideband audio superb full-duplex hands-free speakerphone with advanced acoustic echo cancellation and excellent double-talk performance- Large phonebook (up to 2000 contacts) and call history (up to 2000 records)- Automated personal information service (e.g. local weather etc) personalized music ring tone/ring back tone flexible customizable screen content & format using XML and advanced Web and enterprise applications integration (pending)- Dual switched auto-sensing 10/100Mbps work ports with integrated PoE- Automated provisioning using TR-069 or encrypted XML configuration file SRTP{ and TLS for advanced security protection 802.1x for media access control- SIP Compliant and protocols: SIP RFC2361 TCP/IP/UDP RTP/RTCP HTTP/HTTPS ARP/RARP ICMP DNS (A record SRV NAPTR) DHCP PPPoE TELNET TFTP NTP STUN SIMPLE TR-069 802.1x etc.- Dual switched 10/100Mbps ports with integrated PoE- Back-lit 180x60 graphical LCD display with up to 4 level grayscale- Codecs - Support for G.723.1 G.729A/B G.711u/a G.726-32 G.722 (wide-band) iLBC in-band and out-of-band DTMF (in audio RFC2833 SIP INFO)- Telephony features - Hold transfer forward 3-way conference call park pickup shared-call-appearance (SCA)/bridged-li