Audio Features
HD voice: HD handset, HD speaker
Hearing aid compatible (HAC) handset
Acoustic Shield
Audio codec: Opus, G.722, PCMA, PCMU, G.729A/B, G.726, G.723.1, 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
Call hold, mute, DND
Redial, call return, auto answer
One-touch speed dial, hotline
Call forward, call waiting, call transfer
Group listening, SMS, emergency call
3-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)
USB port (2.0 compliant) for: - Wired/wireless USB headset - USB call recording through USB flash drive - Bluetooth headset through BT40 - Bluetooth call through BT40 - Mobile contacts synchronization through BT40 - Wi-Fi through WF40/WF50 - Expansion module EXP50 (up to 3)
Content Sharing (via Yealink VCD)(1)
Enhanced DSS key
IP-PBX Features
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