Forum Discussion
UDP port 4021 tmobile VS my alarm server...
It is unlikely the T-Mobile is blocking at the network level so it would be related to the router itself. The Envisalink uses UDP port 4021 for communication so the router is blocking that port, po...
That is a real consideration. Given the current operating model of the T-Mobile HI solution it might not be a good fit. The cost may be attractive but if it doesn’t fit the needs well time to compare and shop a bit more.
