Yealink T46U is a mid range desk phone for office and knowledge workers who need a familiar device with top-class audio. T46U has a large, full color display with 10 line keys and 4 soft keys, plus dedicated call-handling buttons. The phone features Yealink Optima HD audio quality, giving you rich, natural sound from the hearing aid compatible handset and full-duplex speakerphone. T46U offers multiple options for connecting a headset. Use the USB port for a plug-and-play USB headset. The RJ9 port supports wired headsets. You can connect a wireless Bluetooth headset by using a Yealink BT40 or BT41 Dongle (not included). If you want wireless network connectivity, Yealink also offers the WF40 and WF50 Wi-Fi Dongles (not included).

 
Communications Protocol: SIP
Lines: 16
Ethernet Ports: 2x Gigabit
PoE: 802.3af Class 3
Additional Interfaces:
2x USB-A 2.0
RJ9 for Headset
Bluetooth: with Yealink BT40/BT41 Dongle (not included)
Wi-Fi: with Yealink WF40/WF50 Dongle (not included)
Display: 4.3" 480x272 color LCD
Speakerphone: full-duplex
Conferencing: 3-way
Audio Codecs:
Wideband: AMR-WB, Opus, G.722
Narrowband: AMR-NB, Opus, G.711u/a, G.723.1, G.729AB, G.726, iLBC
Expandable: yes