Denwa Communications DW-610G User Manual page 57

Field name
Simple Traversal of UDP
through NATs (STUN)
Settings
STUN NAT Traversal
Server Address
Server Port
Blinding Period
SIP Waiting Time
Local SIP Port
Sip Line Using STUN
STUN
explanation
Shows STUN NAT Transverse estimation, true means
STUN can penetrate NAT, while False means not.
Set your SIP STUN Server IP address
Set your SIP STUN Server Port
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.
Specify the sip wait stun time; you can input the time
depended on your network condition.
Configuration the local SIP Port,the default value
is5060(this port immediate effect ,modify, SIP call
will use the modified port communication )