Yealink's SIP-T21P takes entry-level IP phones to a level never achieved before. Making full-use of high-quality materials, plus an extra-large 132 x 64-pixel graphical LCD showing a clear 5-line data display, it offers a smoother user experience, much more visual information at a glance, plus HD Voice characteristics. Dual 10/100 Mbps network ports with integrated PoE are ideal for extended network use. The T21P supports two VoIP account, simple, flexible and secure installation options, plus support for IPv6, Open VPN and a redundancy server. It also operates with SRTP/ HTTPS/ TLS, 802.1x. As a very cost-effective and powerful IP solution, the T21P maximizing productivity in both small and large office environments. Phone Features: 2 VoIP accounts; Call hold, mute, DND; One-touch speed dial, hotline; Redial, call return, auto answer; Call forward, call waiting, call transfer; Group listening, SMS; Call history: dialed/received/missed/forwarded; Local 3-way conferencing; Direct IP call without SIP proxy; Ring tone selection/import/delete; Keypad lock, emergency call; Set date time manually or automatically; Dial Plan, XML Browser, action URL & action URI. IP-PBX Features: Anonymous call, anonymous call rejection; Message waiting indicator (MWI); Voice mail, call park, call pickup; Intercom, paging, music on hold; Call completion, hot-desking.