We have upgraded 5 of our state offices with IP based communications. We chose to use in one office the Cisco 525g IP phone sets. Within the year 3 out of about 20 set's handsets have gone defective in just one of our offices. My complaint is we are beating our heads against the wall trying to get Cisco Customer Support to just simply tell us where we can purchase just the handsets so we can use these phones again. Thank You