Yealink SIP-T31P IP Phone

Display: -2.3-inch graphical LCD
-132×64 pixel resolution
-Backlit display for enhanced visibility

Audio Features:
-HD voice with wideband audio (G.722 codec)
-Full-duplex hands-free speakerphone with Acoustic Echo Cancellation (AEC)
-Hearing aid compatible (HAC) handset
-Supports narrowband codecs: G.711(A/μ), G.729AB, G.726, iLBC
-Voice Activity Detection (VAD) and Comfort Noise Generation (CNG)

VoIP Features:
-Supports up to 2 SIP accounts
-Call hold, mute, DND, call transfer, call forward, call waiting
-5-way local conferencing
-XML/LDAP remote phonebook, local phonebook with up to 1000 entries
-Speed dial, redial, auto answer, and hotline
-Anonymous call and anonymous call rejection
-Message Waiting Indicator (MWI)
-Unified communications integration

Connectivity:
-Dual-port 10/100 Mbps Ethernet switch
-Integrated Power over Ethernet (PoE) support
-RJ9 handset port
-RJ9 headset port with Electronic Hook Switch (EHS) support

User Interface:
-2 line keys with dual-color LEDs
-5 feature keys (message, headset, redial, hands-free, and mute)
-4 context-sensitive soft keys
-6 navigation keys
-Multi-language support
-Wall-mountable design

Power & Environmental:
-Powered via PoE or optional power adapter
-Power consumption: Idle – 1.2W; Peak – 1.8W
-Operating humidity: 10-95% non-condensing
-Operating temperature: -10°C to 50°C (14°F to 122°F)

Security:
-Transport Layer Security (TLS)
-Secure Real-Time Transport Protocol (SRTP)
-HTTPS, 802.1x, IPv6
-Support for OpenVPN, LLDP/CDP/DHCP VLAN

Certifications:
CE, FCC, RoHS compliant

Physical Features:
Dimensions: 188mm x 189mm x 150mm (with stand)
Weight: 730g