The Yealink T21P is a 2-line entry level IP phone that can perform the basic functions you need for extended phone use. The T21P has a phone directory, HD-Voice, a 5-line graphical LCD screen and supports PoE.
This particular addition to the SIP-T2 series has dual 10/100 network ports and supports IPv6, Open VPN and a redundancy server, and also operates with SRTP/ HTTPS/ TLS, 802.1x. for extended network use. The integrated PoE allows for easy, flexible and secure installation. The T21P is designed for business environments with headset compatibility and wall mountable.