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Administrator’s Guide for Yealink VC800&VC500 Video Conferencing System
48
Parameter
Description
Configuration Method
NAT Traversal
Configures the NAT traversal type.
You can configure it for the SIP
account or SIP IP call separately.
Disabled
STUN
StaticNat
Default:
Disabled
Note:
Static NAT works only if this
parameter is set to
StaticNat
.
Web User Interface
To configure route traversal via web user interface:
1.
Click on
Network
->
NAT/Firewall
.
2.
Select
Manual
from the pull-down list of
Static NAT
.
3.
Enter the NAT address in the
NAT Public IP Address
field.
4.
Select
Compulsory
from the pull-down list of
Route Traversal
.
5.
Click
Confirm
to accept the change.
6.
Enable static NAT for SIP account or SIP IP call. For more information, refer to
STUN
You can use the Simple Traversal of UDP through NAT (STUN) function besides ALG or static
NAT. If STUN is enabled, the system can perform private-to-public network traversal using the
STUN server.
STUN is a network protocol, used in NAT traversal for applications of real-time voice, video,
messaging, and other interactive IP communications. The STUN protocol allows the system
behind a NAT to first discover the presence of a NAT and the type of NAT, and then allows the
system to obtain the mapped (public) IP address and port number that the NAT has allocated
for the UDP connections to remote parties. The protocol requires assistance from a third-party
network server (STUN server) usually located on public Internet. The IP phone can be configured
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