Which EnGenius phone systems does the DuraFon-UHF handset work with? EnGenius Updated January 31, 2017 20:49 Follow DuraFon-UHF handset is only compatible with the DuraFon-PRO base station/system. Related articles Can I change the frequency of my DurafonPRO system? Is the DuraFon-UHF compatible with RoIP systems? Can the Durafon-UHF be programmed to operate on frequencies between 450-470 MHz? Caller ID is working on a different analog phone but not on DuraFon Pro/DuraFon4x. Aside from adjusting the Flash Time setting on the phone system, what other troubleshooting steps can we do to get the Caller ID working? Comments 0 comments Please sign in to leave a comment.