Yealink’s SIP-T21P makes full-use of high-quality materials and of a large LCD data display. It offers a smooth user experience, much more visual information at a glance with HD Voice characteristics. The T21P supports VoIP account, simple, flexible and secure installation. It also features a IPv6, Open VPN and a redundancy server support. The T21P E2 optimizes productivity in both small and large office environments.