Aastra Telecom SIP 57I - Manual (Page 143)

Network Settings
41-001160-00, Release 2.1, Rev 04 4-19
Configuring Network and Session Initiation Protocol (SIP) Features
Configuring the IP Phones
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 NAT Settings.
6 Select Nortel NAT.
7 Press Change to set either “Enabled” or “Disabled”.
8 Press Done (3 times) to finish.
Note: The session prompts you to restart the IP phone to apply the configuration settings.
9 Select Restart.