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Enable SIP
Select Enable SIP check box and press
to activate/deactivated using SIP.
STUN Server
STUN (Session Traversal Utilities for NAT)
is a standardized set of methods and a
network protocol to allow an end host to
discover its public IP address if it is located
behind a NAT.
Enter IP address of SIP NTA traversal
server.
STUN Port
Enter port number of STUN server.