Yealink T48U

Audio Features

• HD voice: HD handset, HD speaker
• Hearing aid compatible (HAC) handset
• Acoustic Shield
• Smart Noise Filtering
• Codecs: AMR-WB (optional), AMR-NB (optional), Opus, G.722, G.711(A/µ), G.723.1, 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

• 16 VoIP accounts
• Call hold, mute, DND
• One-touch speed dial, hotline
• Call forward, call waiting, call transfer
• Group listening
• Emergency call
• Redial, call return, auto answer
• 10-way conferencing
• 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 earphone through BT40/BT41
  – Contact synchronization through BT40/BT41
  – Simultaneous connection of one headset and one mobile phone through BT40/BT41
  – 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, USB connectivity to Yealink UH36 headset:
  – 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
• Black list
• XML/LDAP remote phonebook
• Smart dialing
• Phonebook search/import/export
• Call history: dialed/received/missed/forwarded