The SIP-T46U IP phone is a feature rich business phone for excellent communications and extended functionality | It is a 16 line IP phone with a 4.3 inch large color screen with superb audio quality and crystal clear voice communications | Yealink T4U series supports effortless mass deployment and zero touch provisioning with Yealink's redirection and Ppovisioning service and boot mechanism, making the device management labor-saving and efficient for the administrators