Aastra OpenCom 510 User Guide - Page 116
extension Full Cone NAT or RTP-Proxy is activated on the Media Gateway Card., Net Configuration
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Configuration Examples Useful Information on Internet Access ■ The protocol will function without TCP/UDP port numbers, e.g. ICMP or IGMP. The OpenCom 510 NAT has suitable processes for ensuring the functions of many important protocols affected by these rules. These are the protocols FTP (in "active" mode), CuSeeMe ("videoconferencing"), IRC ("chat"), ICMP errors ("traceroute") and ICMP echo ("ping"). 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 Net Configuration: Port Access menu. For further information, refer to the online help of this menu. 114