T38 3cxphone v12

[Yealink Support]

Hi troosters,

1. If you don't set anything in the "Trusted Action URI Server List", your T38 won't prompt a box of "Allow Remote Control", and your call can't be made successfully.
If you set the IP address in the "Trusted Action URI Server List", then when you click to dial in the CTI, T38 will prompt a box.

2. You can't allow all the phone at once. But you can allow your IP address in all of your phones this time and don't need to do this step next time.