How do I disable the CTCSS/DCS tone on the Durafon-UHF? EnGenius Admin Updated August 16, 2020 17:51 Follow Press Mode button three times. Use the up and down button to change the code. (Set “code” to “0”) Related articles I would like to replace a DuraFon PRO handset, but there is no “clear HS” option. What type of headset will work with the DuraFon-UHF handset? Can I change the frequency of my DurafonPRO system? How can I find out what frequencies my existing two-way radios are using? (Durafon-UHF) Can you program each line on UHF/PRO/SIP handset to a specific extension? Comments 0 comments Please sign in to leave a comment.