User's Manual

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seconds. Default value is 50 seconds.
SIP Wait Stun Time : Configure the timeout which phone would wait
STUN response before SIP request is sent. Default
value is 800 ms.
Here is an example to set STUN server to ‘stun1.voiceeclipse.net’.
a) Export configuration files from Web user interface.
b) Find ‘<SIP CONFIG MODULE>’
c) Modify the fields shown below:
STUN Server :stun1.voiceeclipse.net
STUN Port :3478
STUN Refresh Time :50
SIP Wait Stun Time :800
2) Line configuration:
Parameters Descriptions
SIP1 NAT Type : Configure Line 1 that uses
STUN as its NAT
traversal method. 0 is Disabled, 1 is Enabled.
Default is 0.
SIP2 NAT Type : Configure Line 2 that uses
STUN as its NAT
traversal method.
Note: These two configuration items should be listed below --SIP Line List-- :’
Here is example to set line 1 STUN enable and line 2 disable.
--SIP Line List-- :
SIP1 NAT Type :1
SIP2 NAT Type :0
6.3 Rport
Rport is another NAT Traversal method in SIP stacks. It is also a keyword string in SIP information.
RFC3581 describes the implementation of Rport, which is also called Symmetric Response. After SIP
server received a UDP request, it should check whether there is rportstring in the Viafield and its value
is empty. If so, the server should insert receivedparameter and rportparameter in the viafield when it
sends response to the client. The value of ‘received parameter should be the IP address from which its
packets are directly. And the address might be NAT devices address or phones address connecting to