User manual

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Refresh Time Set expire time of IAX2 server register, you can set it between 60 and
3600 seconds.
Enable Register Start to register the IAX2 server or not by selecting it or not.
Enable G.729 Enable or disable code G.729 by selecting it or not
4.3.3.3. Stun Config
In this web page, you can config SIP STUN.
STUN:
By STUN server, the phone in private network could know the type of NAT and the NAT
mapping IP and port of SIP. The phone might register itself to SIP server with global IP and port to
realize the device both calling and being called in private network.
STUN
Field name explanation
STUN NAT Transverse Shows STUN NAT Transverse estimation, true means STUN can
penetrate NAT, while False means not.
STUN Server Addr Set your SIP STUN Server IP address