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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
Item
explanation
Simple Traversal of UDP through NATs (STUN) Settings
STUN NAT Traversal
Shows STUN NAT Transverse estimation, true means STUN can
penetrate NAT, while False means not.
Server Address
Set your SIP STUN Server IP address.
Server Port
Set your SIP STUN Server Port.
Blinding Period(s)
Set STUN blinding period(s). If NAT server finds that a NAT mapping is idle after
time out, it will release the mapping and the system need send a STUN packet
to keep the mapping effective and alive.
SIP Waiting Time
Specify the sip wait stun time; you can input the time depended on your
network condition.
Local SIP Port
Configuration the local SIP Port, the default value is5060(this port immediate
effect ,modify, SIP call will use the modified port communication )
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