RTP
Proceed as follows:
Using the Configuration Manager (Administration > VoIP Configuration)
Requirements:
VoIP channels (optional, see Technical Data in the Instructions)
VoIP module/CPU
The RTP port is a port on the local system that is used as the outgoing port for RTP transfers.
*Note: The page Overviews > Ports shows an overview of the PBX ports (incoming and outgoing).