DATASHEET: Protocols/StandardsSIP RFC3261, TCP/IP/UDP, RTP/RTCP, HTTP/HTTPS, ARP/RARP, ICMP, DNS (A record, SRV, NAPTR), DHCP, PPPoE, SSH, TFTP, NTP, STUN, SIMPLE, LLDP-MED, LDAP, TR-069, 802.1x, TLS, SRTPNetwork InterfacesDual switched auto-sensing 10/100 Mbps Ethernet portsGraphic Display132 x 48 backlit graphical LCD displayFeature Keys2 line keys with dual-color LED and 2 SIP accounts, 3 XML programmable context sensitive soft keys, 5 (navigation, menu) keys. 13 dedicated function keys for PAGE/INTERCOM, PHONEBOOK, MESSAGE, HOME, HOLD, RECORD, MUTE, HEADSET, TRANSFER, CONFERENCE, SEND and REDIAL, SPEAKERPHONE, VOLUMEVoice CodecsG. 711μ/a, G. 722 (wideband), G. 723, G. 726-32, G. 729 A/B, in-band and out-of-band DTMF (In audio, RFC2833, SIP INFO), VAD, CNG, AEC, PLC, AJB, AGCTelephony FeaturesHold, transfer, forward (unconditional/no-answer/busy), 3-way conferencing, call park/pickup, call waiting, off-hook auto dial, auto answer, click-to-dial, flexible dial plan, hot desking, personalized music ringtones, server redundancy & fail-overPhone bookdownloadable; XML, LDAP, up to 500 itemsCall historyUp to 200 recordsHeadset JackRJ9 headset jack (allowing EHS with Plantronics headsets)HD AudioYes, HD handset and speakerphone with support for wideband audioBase StandYes, 2 angled positions available, wall mountableWall MountableYesQoSLayer 2 QoS (802.1Q, 802.1P) and Layer 3 (ToS, DiffServ, MPLS) QoSSecurityUser and administrator level access control, MD5 and MD5-sess based authentication, 256-bit AES encrypted configuration file, TLS, SRTP, HTTPS, 802.1x media access controlMulti-languageen, de, it, fr, es, pt, ru, hr, zh, ko, ja, ... Upgrade/ProvisioningFirmware upgrade via TFTP / HTTP / HTTPS, mass provisioning using TR-069 or AES encrypted XML configuration filePowerUniversal Power Supply Input 100-240VAC 50-60Hz; Output +5VDC, 600mADimension209mm (L) x 184,5mm (W) x 76,2mm (H) (with handset)Weight0,74kg; Package weight: 1,1kgPackage ContentGXP1620 phone, handset with cord, base stand, universal power supply, network cable, Quick Installation Guide, brochure, GPL License