12 VoIP accounts • Call hold, mute, DND, redial, call return, auto answer • One-touch speed dial, call forward, call waiting, call transfer • Group listening, hotline, 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) • 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 4.2 for: - Bluetooth headsets - Contact synchronization - Bluetooth call • USB port (2.0 compliant) for: - Wired/wireless USB headset - USB call recording through USB flash drive - Expansion module EXP50 (up to 3) • Content Sharing (via Yealink VCD)(1) • Enhanced DSS key
