Hello,
Yes, it is possible to do that.
You can connect RUT955 with TSM232 satellite terminal through RS232 port.
Then put router IP address into each device, and they will send data to the RUT955 router, router to satellite terminal.
However, do you really need satellite terminal?
If you do not need, there is no need to use RUT955, because devices can send the data themselves.
Best regards.