Avaya one-X Deskphone is a family of next-generation IP telephones that delivers a new and unique communications experience to drive increased productivity. Smart, sleek, stylish and highly functional, the Avaya 9640 IP Telephone is designed for the Essential user, those for whom the telephone is essential in order to perform their jobs. Workers who conduct much of their business on the phone - moving from one call to the next. The Avaya 9640 delivers advanced communications capabilities - high definition audio, a brilliant - high resolution pixel based color display.