Aastra OpenCom 100 series - Page 106

Configuration Examples
104
Depending on the internet telephony protocol (VoIP, SIP) the required NAT extension
(“Full Cone NAT”) or RTP-Proxy is activated on the Media Gateway Card.
Protocols which require inward-directed connection establishment can be configured
in the Network: Port Access menu. For further information, refer to the online help of
this menu.