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QoS
Enable this function to ensure the quality of VoIP conversation. The default value is Enable.
NAT Traversal
When the WAN interface of Vigor3300+ is a private IP address, the VoIP traffics must pass
through the upper-layer NAT router. User can enable STUN function in order to make VoIP
function can work smoothly.
Note: The upper-layer router must forward the UDP packets with port number 5060 (for
SIP protocol), 13456~13486 (for RTP) and 49170~49200 (for T.38) to the WAN IP
address of Vigor3300V+. Users can define the port number(s) for their necessity.
Vigor3300V+ Series User's Guide
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