Yealink SIP-T44U IP Desktop Phone

Key Features:

• 2.8” colorLCD with backlight
• Up to 12 SIP accounts
• Optima HD voice with Acoustic Shield and Smart Noise Filtering
• Dual-port Gigabit Ethernet
• Wi-Fi via WF40/WF50
• Bluetooth via BT41/BT51
• Support USB recording
• Support expansion modules
• Headset, EHS support
• PoE support
• Stand with two adjustable angles, wall mountable

Technical Specifications

• Audio Features
  • HD voice: HD handset, HD speaker
  • Hearing aid compatible (HAC) handset
  • Acoustic Shield
  • Smart Noise Filtering
  • Wideband codec: AMR-WB (optional), G.722
  • Narrowband codec: AMR-NB (optional), PCMU (G.711μ), PCMA (G.711A), G.723.1, G.729, G.729A, G.729B, G.729AB, G.726, iLBC
  • DTMF: In-band, Out-of-band(RFC 2833) and SIP INFO
  • Full-duplex hands-free speakerphone with AEC
  • VAD, CNG, AEC, PLC, AJB, AGC
• Phone Features
  
  • 12 VoIP accounts
  • One-touch speed dial, redial
  • Call forward, call waiting, call transfer, call hold
  • Call return, group listening
  • Emergency call
  • Mute, DND
  • Auto answer
  • Hoteline
  • 5-way conference call
  • Direct IP call without SIP proxy
  • Ring tone selection/import/delete
  • Set date time manually or automatically
  • Dial Plan, XML Browser, Action URL/URI
  • RTCP-XR (RFC3611), VQ-RTCPXR (RFC6035)
  • Dual USB ports (2.0 compliant)
    
    • Bluetooth headset through BT40/BT41/BT51
      
      • Support Yealink Bluetooth headset BH71/BH71 Workstation/ BH71 Workstation Pro/BH72/BH76/UH38 through BT51
    • DECT wireless headset (Yealink WH62 Portable/WH63 Portable)
    • Contact synchronization through BT40/BT41/BT51
    • Simultaneous connection of one headset and one mobile phone through BT40/BT41/BT51
    • Wi-Fi through WF40/WF50
    • USB call recording through USB flash drive
    • USB headset
    • Expansion Module EXP43
    • Wireless Headset Adapter EHS40
    • USB/Bluetooth connectivity to Yealink CP900/CP700 speakerphone/wireless headset UH38, USB connectivity to Yealink wired headset UH34/UH36/UH37:
      
      • Basic functions: Answer / end, call mute
      • Enhanced function: audio optimization, redial, call hold, volume synchronization, multiple calls control
  • Enhanced DSS key
• Directory
  
  • Local phonebook up to 1000 entries
  • Blocklist
  • XML/LDAP remote phonebook
  • Smart dialing
  • Phonebook search/import/export
  • Call history: dialed/received/missed/forwarded
  • Busy Lamp Field (BLF), Bridged Line Apperance (BLA)
  • Anonymous call, anonymous call rejection
  • Hot-desking, voice mail
  • Flexible seating, Executive and Assistant
  • Call park, call pickup
  • Centralized call recording, call recording
  • Visual voice mail
• Display and Indicator
  
  • 2.8” 320x240-pixel color LCD with backlight
  • LED for call and message waiting indication
  • Dual-color (red or green) illuminated LEDs for line status information
  • Intuitive user interface with icons and soft keys
  • Multilingual user interface
  • Caller ID with name and number
  • Power saving
• Feature keys
  
  • 8 line keys with LED
  • 8 line keys can be programmed up to 21 paperless DSS keys (3-page view)
  • 5 features keys: message, headset, mute, redial, hands-free speakerphone
  • 4 context-sensitive “soft” keys
  • 6 navigation keys
  • 2 volume control keys
  • Illuminated mute key
  • Illuminated headset key
  • Illuminated hands-free speakerphone key
• Interface
  
  • Dual-port Gigabit Ethernet
  • Power over Ethernet (IEEE 802.3af), Class 3
  • 2 x USB port (2.0 compliant)
  • 1 x RJ9 (4P4C) handset port
  • 1 x RJ9 (4P4C) headset port
• Other Physical Features
  
  • Color: Classic Grey
  • Stand with 2 adjustable angles
  • Wall mountable
  • External Yealink AC adapter (optional): AC 100-240 V input and DC 5 V/1.2 A output
  • USB output currency: 5 V 500 mA
  • Power consumption (PSU): 1.7W - 4.1W
  • Power consumption (PoE): 2.0W - 4.9W
  • Dimension (W*D*H*T): 224.9 × 206.2 × 174.9 × 52 mm
  • Operating humidity: 5% to 90%, noncondensing
  • Operating temperature: -10 to +45°C (+14 to 113°F)
  • Storage temperature: -30 to +70°C (-22 to +158°F)
• Management
  
  • Configuration: browser/phone/auto-provision
  • Auto provision via FTP/TFTP/HTTP/HTTPS for mass deploy
  • Auto-provision with PnP
  • Broadsoft device management
  • Zero-sp-touch TR-069
  • Phone lock for personal privacy protection
  • Reset to factory, reboot
  • Package tracing export, system log
• Network and Security
  
  • SIP v1 (RFC2543), v2 (RFC3261)
  • Call server redundancy supported
  • NAT traversal: STUN mode
  • Proxy mode and peer-to-peer SIP link mode
  • IP assignment: static/DHCP
  • HTTP/HTTPS web server
  • Time and date synchronization using SNTP
  • UDP/TCP/DNS-SRV(RFC 3263)
  • QoS: 802.1p/Q tagging (VLAN), Layer 3 ToS DSCP
  • SRTP for voice
  • Transport Layer Security (TLS 1.3)
  • HTTPS certificate manager
  • AES encryption for configuration file (AES256)
  • Digest authentication: MD5/SHA1/SHA224/- SHA256/SHA384/SHA512
  • OpenVPN, IEEE802.1X, L2TP VPN
  • IPv6
  • LLDP/CDP/DHCP VLAN
  • ICE
  • WPA2/WPA3
  • Secure boot
  • GARP (Generic Attribute Registration Protocol)