Build RTK Radio module for Topcon AGI4

I have used v5 and understand there has been some bugs in the first v5 versions. The ntrip client in console is in v4.04.x may have been in the last v4.02.xx too.

Good evening,
I have an AGI-4 equipped with a gyroscope and an internal RTK modem and an X25 console.
I would like to add a RUT955 modem connected to the AGI-4 by a cable on the modem side, an RS232 socket and on the AGI-4 side, a DEUTCH socket.
I tried several things but it doesn’t work, can anyone help me configure my modem and the X25, I think it’s just a configuration problem.
Thank you in advance for your help.