Aastra Telecom C53I User Guide

Page of 602
Advanced Network Settings
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41-001160-00, Rev 01  Release 2.0  
IP Phone Administrator Guide
Configuring the IP Phones
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, 
 on 
IP Phone UI
Step Action
1
Press 
 on the phone to enter the Options List.
2
Select Network Settings.
3
Select NAT.
4
Select NAT Settings.
5
Select NAT IP.
6
Enter a public IP address of your NAT device in dotted-decimal format.
7
Press Done to save the NAT setting.
8
Select NAT SIP Port.
9
Enter the public SIP signalling port number of your NAT device.
10
Press Done to save the changes.