Grandstream GXP1628 is a high-end IP phone for small business users. It delivers a suite of powerful VoIP features in an easy-to-use fashion with a modern design, and offers support for up to 2 lines. It features Gigabit ports to maximize connection speeds and call quality, and also includes 8 BLF / speed dial keys that allows users to easily monitor presence and status of other extensions and transfer calls.

• 2 lines, 2 SIP accounts, up to 2 call appearances
• Dual-switched auto-sensing 10/100/1000Mbps network ports
• Includes 8 dual-colored BLF/speed dial keys
• Built-in PoE to power the device and give it a network connection
• HD audio maximize audio quality, full-duplex speakerphone
• Use with the Grandstream UCM series of IP PBXs for Zero Config provisioning
• Electronic Hook Switch (EHS) support for Plantronics
• Automated provisioning options include TR-069 and XML config files
• TLS and SRTP security encryption technology to protect calls and accounts
• 3-way audio conferencing for easy conference calls

• Protocols/Standards: SIP 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, SRTP
• Network Interfaces: Dual switched auto-sensing 10/100/1000 Mbps Ethernet ports, integrated PoE
• Graphic Display: 132 x 48 backlit graphical LCD display
• Voice Codecs: Support for G.711u/a, G.722 (wide-band), G.723 (pending), G.726-32, G.729 A/B, iLBC (pending), Opus (pending), in-band and out-of-band DTMF (in audio, RFC2822, SIP INFO), VAD, CNG, AEC, PLC, AJB, AGC
• Headset Jack: RJ9 headset jack (allowing EHS with Plantronics headsets)
• Base Stand: 2 angles positions available, wall mountable
• QoS: Layer 2 QoS (802.1Q, 802.1P) and Layer 3 (ToS, DiffServ, MPLS) QoS
• Security: User and administrator level access control, MD5 and MD5-sess based authentication, 256-bit AES encrypted configuration file, TLS, SRTP, HTTPS, 802.1x media access control
• Multi-Language: English, German, Italian, French, Spanish, Portuguese, Russian, Croatian, simplified and traditional Chinese, Korean, Japanese, and more
• Upgrade / Provisioning: Firmware upgrade via TFTP/HTTP/HTTPS, mass provisioning using TR-069 or AES encrypted XML configuration file
• Power & Green Energy Efficiency: Universal Power Supply Input 100-240VAC 50-60Hz; Output +5VDC, 600mAPoE: IEEE802.3af Class 2, 3.84W-6.49W
• Dimensions: 220.5 x 192.5 x 76mm
• Unit Weight: 0.8kg
• Package Weight: 1.2kg
• Operational Temperature: 0 to 40°C
• Storage Temperature: -10 to 60°C
• Humidity: 10 to 90% non-condensing