Grandstream GXP2170 Enterprise HD IP Telephone

Line Keys - 12 line keys with up to 6 SIP accounts
Speaker Phone - HD speakerphone with support for wideband audio
Ethernet Connectivity - 2 x 10/100/1000 Mbps Gigabit Ethernet ports with integrated PoE
Display Type - 4.3 inch (480x272) TFT color LCD
Headset Support - RJ9 headset jack (allowing EHS with Plantronics headsets)
Protocols - SIP RFC3261, TCP/IP/UDP, RTP/RTCP, HTTP/HTTPS, ARP, ICMP, DNS and more
QoS - Layer 2 QoS (802.1Q, 802.1P) and Layer 3 (ToS, DiffServ, MPLS) QoS
Warranty - 1 Year
The GXP2170 is a powerful enterprise-grade IP phone that is ideal for busy users who handle high call volumes. This top-of-the-line Enterprise IP Phone features up to 12 line keys/line appearances and 6 SIP accounts using 4.3 inch color display LCD and full HD audio.

Protocols/Standards
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
Network Interfaces
Dual switched auto-sensing 10/100/1000 Mbps Gigabit Ethernet ports with integrated PoE
Graphic Display
4.3 inch (480x272) TFT color LCD
Bluetooth
Yes, integrated
Voice Codecs
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)
Auxiliary Ports
RJ9 headset jack (allowing EHS with Plantronics headsets), USB, extension module port
HD Audio
Yes, HD handset and speakerphone with support for wideband audio
QoS
Layer 2 QoS (802.1Q, 802.1P) and Layer 3 (ToS, DiffServ, MPLS) QoS
Extension Module
Yes, can power up to 4 GXP2200EXT modules which features a 128x384 graphic LCD, 20 quick-dial/BLF keys which dual-color LED, 2 navigation keys, and less than 1.2W power consumption per unit.