I have brought tow unit quantum Gateway model A400, I have setup an IVR TFTP server base in my office. But when I go to client side, install the A400 gateway and configure the IVR file server IP to my TFTP server. It shows TFTP open failure, and out of time plays the voice files.
Someone told me that the ISP has blocking the port cause the files can transfer through the TFTP port. Anyone have this experience of port blocking?