Anyone have any luck using Relayfax to send and recieve faxes? For some reason i come with with an error of "Call Interupted" when trying to send. The whole faxing and VOIP is a real pain, I bought a grandstream gateway and tried to use an analog fax and that didnt work. Even worked with 3cx support and with that issue and doesnt look very promising. I feel like some of these solutions that 3cx offers only work in perfect conditions.