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ALLO PRI Gateway
User Manual V2.0
20
NAT Configuration:
NAT:
NAT option is checked, when the PRI Gateway is behind the Router/Firewall
Stun Server IP
: If the PRI Gateway is behind a non-symmetric NAT router, it may be necessary
to use STUN to allow PRI Gateway to reliably communicate via IP through the router. Enter a
STUN server IP address or domain name in the STUN Server field. For a list of public STUN
servers, please Refer to:
http://www.voip-info.org/wiki/view/STUN
External IP:
Enter the NAT Traversal IP address i.e. Public IP Address of your internet , to
communicate with Public Network when PRI Gateway is behind the NAT. This IP address will
substitute in all outgoing SIP messages instead of Local IP address.
Click on
“APPLY
“button, followed by “
SAVE ALL
” button to update the configuration changes.
3.9 Network Services:
By clicking on the
SETUP
>
Network Services
link on the top navigation of the PRI Gateway
menu, we reach this section:
SIP Port
: The local listening UDP port for SIP messages. By default 5060
RTP Port Range
: PRI Gateway will start listening for media transfer on ports 16001 to 17000.
Make sure you configure this dynamic range of ports on your NAT Router. When the PRI
Gateway is behind a NAT and the NAT is configured to do port forwarding with above
mentioned port range for UDP ports.