SmartVoice Gateway Series 4-port and 8-port Gateways Reference Guide

SmartVoice Gateway(s) User Guide 59
YML832 Rev2
STUN Inquiry
Using “STUN Inquiry” to detect your IP sharing device’s NAT type and communication between STUN
server and client (built-in SmartVoice gateway).
NOTE: If detected NAT type is “Symmetric NAT”, then the gateway is not able
to traverse the NAT of your Internet sharing devices. This is not a flaw of the
gateway’s design, but nature of STUN protocol design.