Yealink SIP T23G is great when it comes to provisioning and security. T23G is a cost effective IP Phone with superb user interface. In addition, it provides excellent HD Voice. Also, it is an amazing phone for the people working in small and medium organization requiring Gigabit Ethernet with amazing features. It is an excellent choice for business managers where need of collaboration is higher. The T2 Series of yealink have been enabled with Yealink HD technology that allows you to hear the calling party very clearly.