Yealink SIP-T31P – Classic Business IP Phone-T31P

Audio:

• HD Voice: Yes, with Yealink Noise Proof Technology for superior voice clarity
• Supported Codecs:
  • G.711 (A/U), G.722, G.729, G.723.1, iLBC, OPUS
• Speakerphone: Full-duplex speakerphone with HD voice support
• Hearing Aid Compatibility: Yes

Display:

• Type: 2.3-inch graphical LCD
• Resolution: 132×64 pixels
• Backlight: Yes
• Icons: Simple and intuitive user interface with programmable soft keys

Connectivity:

• Ports:
  • 1 x Gigabit Ethernet port (10/100/1000 Mbps)
  • 1 x Fast Ethernet port (10/100 Mbps) for PC or laptop connection
• PoE: Yes, IEEE 802.3af PoE support (power via Ethernet)
• Wi-Fi: Not natively supported but can be achieved with an optional Yealink WF40 Wi-Fi dongle.

Call Handling:

• SIP Accounts: Up to 3 SIP accounts
• Call Features:
  • Call hold, transfer, forwarding, waiting
  • 3-way conference calling
  • Speed dial, redial, mute
  • Call history (incoming, outgoing, missed)
• DND (Do Not Disturb): Yes
• Call Waiting: Yes

Security:

• Encryption: Support for TLS, SRTP, and HTTPS for secure communication.
• Provisioning:
  • Automatic provisioning via Yealink’s RPS and support for FTP, TFTP, HTTP, HTTPS.
  • Firmware updates can be done remotely.

Physical:

• Dimensions: 182mm (W) x 160mm (D) x 160mm (H) (7.17 in x 6.3 in x 6.3 in)
• Weight: 0.69 kg (1.52 lbs)
• Mounting: Wall-mountable with an optional wall mount kit.

Power:

• PoE Support: Yes (IEEE 802.3af)
• DC Power Supply: Optional 5V DC power adapter (sold separately)

Environmental:

• Operating Temperature: 0°C to 40°C (32°F to 104°F)
• Operating Humidity: 10% to 90% relative humidity (non-condensing)
• Storage Temperature: -10°C to 50°C (14°F to 122°F)

Certifications:

• FCC, CE, RoHS