Need solution for T-Mobile blocking TCP
We have a coachmonitoring system that we need to transmit data to an off-site server. The gateway is connected via wifi, and the data is transmitted from the coach's dual-carrierrouter. The monitor works flawlessly when connected via AT&T's SIM. But, anytime we connect to T-Mobile, our preferred service, the data is blocked and we can no longer monitor our systems. I've been told the gateway uses a simple, old protocol of FTP and uses TCP port 8079. I have no idea how to fix this problem, but refuse to just quit out of ignorance.