Specifications: Programmable Keys: 28 per page
Pages: 3, for 84 keys total
LED Indicators: yes
Busy Lamp Fields: supported
Speed Dialing: supported
Stackable: up to 3 modules (252 keys total)
Power: via phone
Specifications: 2.8" (Diagonal) Color Display
Multi-line phone with 4 red / green line / feature indictors
SIP Software Protocal
4 Softkeys
Wideband audio for handset and wired headset
Full Duplex Speakerphone
Gigabit Ethernet 10/100/1000 line interface
2nd Gigabit Ethernet interface
Dual position desk stand, optional wall mount stand
PoE Class (IEEE 802.3af) registers as class 1 device and supports 802.3az
Optional AC to 5 volt adapter
Security: Media: SRTP
Control: TLS / SIPS / HTTPS
Management: Syslog support, telnet, SSH, remote management using web browser
Ports: Telephone Interfaces: 1 x RJ11 FXS port, One (1) RJ11 FXO PSTN line port with lifeline support
Network Interface: 2 x 10/100 Mbps ports (RJ45) with integrated NAT router
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