PURE M3700 User Manual page 32

2. If no useable free STUN Server available, for most of ITSP (Internet Telephony Service
Provider), their Outbound Proxy Server supports Media Relay, device under NAT can penetrate
NAT without configuration.
3. STUN does not support Symmetric NAT.
STUN Server
Configuration
WEB Page: ADVANCED\STUN
You can enable and disable the service on WEB page.
Internet
NAT WAN IP
NAT Device
(Router, IP
sharing device)
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M3700