Features: Supports 4 lines, 4 SIP accounts and 5-way voice conferencing
HD audio on speakerphone and handset, 5 programmable context-sensitive soft keys
Compatible with GXP2200 LCD extension module (GXP2200 EXT)
4.3 inch (480 x 272) color-screen LCD
Dual Gigabit ports, integrated PoE
Integrated Bluetooth for use with Bluetooth headsets and Bluetooth-enabled mobile devices (transferring contact books and calls), USB, EHS for Plantronics headsets
Protocols: HTTPS, FTP client, TLS v1.2, SCP (client and server), SFTP, SMTP client for use by scripts and the command line, SNMP (v2/v3), SSH; remote management via Digi Remote Manager®; protocol analyzer, ability to capture PCAP for use with Wireshark; DynDNS; dynamic DNS client compatible with BIND9/No-IP/DynDNS; captive portal, Intelliflow; Nagios, DNS server, NTP server, multicast, mDNS, IPerf
Security: IP filtering, stateful firewall, custom firewall rules (iptables), address and port translation, TLS 1.2 and above, OpenVPN client and server, VPN tunnels; Authentication: RADIUS, TACACS+; certificates; MAC address filtering; VLAN support