RJ9 headset jack (allowing EHS with Plantronics headsets), USB, extension module port

Yes, 2 angle positions available, Wall Mountable

Yes, can power up to 4 GXP2200EXT modules which features a 128×384 graphic LCD, 20 quick-dial/BLF keys which dual-color LED, 2 navigation keys, and less than 1.2W power consumption per unit.

Yes, HD handset and speakerphone with support for wideband audio

Layer 2 QoS (802.1Q, 802.1P) and Layer 3 (ToS, DiffServ, MPLS) QoS

Yes, integrated

SIP RFC3261, TCP/IP/UDP, RTP/RTCP, HTTP/HTTPS, ARP, ICMP, DNS (A record, SRV, NAPTR), DHCP, PPPoE, TELNET, TFTP, NTP, STUN, SIMPLE, LLDP, LDAP, TR-069, 802.1x, TLS, SRTP, IPV6

4.3inch (480×272) TFT color LCD

English, German, Italian, French, Spanish, Portuguese, Russian, Croatian, Chinese,Korean, Japanese

گرنداستریم-Grandstream

Hold, transfer, forward, 5-way conference, call park, call pickup, shared-call-appea-rance (SCA)/bridged-line-appearance(BLA), downloadable phonebook (XML, LDAP, up to 2000 items), call waiting, call log(up to 500 records), XML customization of screen, off-hook auto dial, auto answer, click-to-dial, flexible dial plan, hot desking, persona-lized music ringtones and music on hold, server redundancy and fail-over

12line keys with up to 6 SIP accounts, 5 XML programmable context sensitive soft-keys, 5 navigation/menu keys, 11 dedicated function keys for : MESSAGE (with LED indicator), PHONEBOOK, TRANSFER, CONFERENCE, HOLD, HEADSET, MUTE, SEND/REDIAL, SPEAKERPHONE, VOL+, VOL-

User and administrator level passwords, MD5 and MD5-sess based authentication,256-bit AES encrypted configuration file, SRTP, TLS, 802.1x media access control

Support for G7.29A/B, G.711µ/a-law, G.726, G.722(wide-band), in-band and out-of-band DTMF(in audio, RFC2833, SIP INFO)

Firmware upgrade via TFTP / HTTP / HTTPS, mass provisioning using TR-069 or AES encrypted XML configuration file.