User Friendly Wireless • Transmission • High Expandability • Efficient Installation and Provisioning

No Perception Upgrade·Sync Level1 Base Backup·Headsets Registration · Seamless Stability·Easy Deployment··Wide Coverage··Full Scenarios··Multiple Phone Books

• 3.7" 360x160-pixel graphical LCD with backlight • Adjustable LCD screen • Dual firmware images • T53/T53W/T54W/T57W firmware unified • Built-in Bluetooth 4.2 • Built-in dual band 2.4G/5G Wi-Fi (802.11a/b/g/n) • USB 2.0 port for USB recording, wired/wireless USB headsets and EXP50 • Up to 12 VoIP accounts • Dual-port Gigabit Ethernet • PoE support • HAC Handset • Paperless label design • Wall mountable

• Key Features and Benefits • Support Air and LAN synchronization • Seamless handover and roaming • Up to 10 DM • Up to 600 base stations • Up to 2500 handsets • Up to 2500 SIP accounts • Up to 2500 parallel calls • Support XML/LDAP/Remote Phonebook • Support XSI Directory/XSI Call Log • External antenna, DECT radio coverage up to 50 m indoors and 300 m outdoors • Support IPv6 • Support PoE • Support SRTP/SIPS/TLS, LDAP(s) and HTTPS • Compatible with W57R/W59R/W56H/W53H/W73H/W78H, CP930W, CP935W and DD Phone • DECT Technology: Yealink DECT technology focuses on high-quality Audio VoIP (wideband) and low bit-rate data applications. However, we are incompatible with third-party DECT devices (base station, handset, etc.).