Aastra 9143i Series Administrator's Manual page 217

Configuring NAT Address and Port (optional)
You can also configure a specific NAT address and port on the IP phone using the
configuration files, IP Phone UI, or Aastra Web UI.
Configuration Files
For specific parameters you can set in the configuration files, see Appendix A, the section,
Address Translation (NAT) Settings"
IP Phone UI
Step Action
1 Press on the phone to enter the Options List.
2 Select Administrator Menu.
3 Enter your Administrator password.
Note: The IP Phones accept numeric passwords only.
4 Select Network Settings.
5 Select Static NAT.
6 Select NAT IP.
7 Enter a public IP address of your NAT device in dotted-decimal format.
8 Press Done to save the setting.
9 Select NAT SIP Port. Default is 51620.
10 Enter the public SIP signalling port number of your NAT device.
11 Press Done to save the setting.
12 Select NAT RTP Port.
13 Enter the RTP Port number of your NAT device. Default is 51720.
14 Press Done (4 times) to finish.
Note: The session prompts you to restart the IP phone to apply the configuration settings.
15 Select Restart.
41-001160-03, Rev 00, Releaes 2.4
Configuring Network and Session Initiation Protocol (SIP) Features
on page A-29.
Network Settings
"Network
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