16 VoIP accounts Call hold, call forward, call waiting, call transfer One-touch speed dial, hotline, mute, DND Group listening, SMS, emergency call Redial, call return, auto answer 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) Built-in dual band Wi-Fi: Network standard: IEEE802.11a/b/g/n/ac Transmission Rate: Up to 433Mbps (dynamic) Frequency range: 2.4GHz/5.0GHz Built-in Bluetooth for: Bluetooth headset Mobile contacts synchronisation Bluetooth call USB port (2.0 compliant) for: Wired/wireless USB headset USB call recording through USB flash drive Colour-screen expansion modules EXP50 (up to 3) Content Sharing (via Yealink VCD) Enhanced DSS key
