Aastra Telecom SIP 480I - Manual (Page 76)

Advanced Network Settings
4-20 41-001129-00 Rev 09, Release 1.4.1
IP Phone Administrator Guide
Configuring the IP Phones
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 Port.
9 Enter the public SIP signalling port number of your NAT device.
10 For 9112i/9133i:
Press Set to save the changes.
For 480i/480i CT:
Press Done to save the changes.
IP Phone UI
Step Action