The T42S is a feature-rich business tool for superior communications and extended functionality, which is ideal for common area use and for staff in the call center. It offers a faster, more-responsive interface than the T42G and several performance-enhancing functions. The T42S with Yealink Optima HD Voice technology and SILK codec delivers superb audio quality and crystal clear voice communications. Meanwhile, it supports Conferencing, Boss/Admin, Common Area Phone, Calendar, Hot-desking and other productivity-enhancing functions. Its class2 PoE (power over Ethernet) helps to reduce its carbon footprint and its Gigabit Ethernet technology is built for rapid call handling. The model is wall-mountable and can be paired with Yealink YHS32/YHS33 headset and other major brand headsets via the Yealink EHS36 Wireless Headset Adapter