Hi Bob
Up until a week or two ago I had a vonage adapter working in tandem with a 5G router from 3. For some reason the Vonage phone stopped working andf despite repeated interactions with the Vonage help desk the probelem was not resolved, even after they supplied me with a new vonage box.. They asked me to ask 3 to open ports with certain numbers (which I now forget and did not understand). Anyway I contacted 3 and they refused even to dicuss the problem as my broadband connection was working fine and they only fix problems if the broadband connection is defective (actually it is superfast and has so far been reliable). Upshot is I've cancelled my Vonage contract and have gone mobile only. It seems likely that if you get a vonage system it will not work with a 5G router from 3.
