Remote Audio Server - Port
If your installation is running as Remote Base Server it can also serve as an Audio Server. Specify a TCP Port your audio server is "listening" to for incoming connects. This port must be another port than the one in the Remote Server settings! Be sure to open this TCP audio port in your firewall and DSL router.
You can use ports below 1024 but it's not recommended because many ports below 1024 are reserved ports.
The Audio Server can be enabled or disabled here by checking the Activate checkbox. This applies to the FTDXRC Server, too.