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SIP - IAX ports

SIP ports

Protocol Port Used by
Udp 3478 STUN
Udp 5060 SIP
Udp 8000 RTP
Udp 8001 RCTP

If you use more than one line, you need also to open additional UDP ports after 8001, i.e. 8002 for the second line, 8003 for the third and so on....

IAX ports

Protocol Port Used by
Udp 4569 IAX

IAX uses a single UDP port 4569, and thus works well in NAT environments. IAX uses ONLY one udp port for both control and data traffic

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