Aastra Telecom 480I Configuring Nortel NAT optional, Nortel Networks NAT, Select SIP Settings

Configuring the IP Phones

Advanced Network Settings

Nortel Networks NAT

Nortel Networks provides a proprietary solution to support connectivity to their proxies from phones placed behind devices (such as routers or firewalls) that use NAT. Nortel uses the SIP ping request/reply between the Nortel proxy and the phone in order to keep the connection through the router or firewall active. A SIP Nortel NAT timer is the interval, in seconds (default is 60), that the phone sends SIP ping requests to the Nortel proxy.

Configuring Nortel NAT (optional)

You can configure Nortel NAT using the configuration files, the IP phone UI, or the Aastra Web UI.

Configuration Files

For specific parameters you can set in the configuration files, see Appendix A, the section, “Network Address Translation (NAT) Settings” on page A-21.

IP Phone UI

Step Action

1For 9112i/9133i:

Press Ion the phone to enter the Options List.

For 480i/480i CT:

Press %on the phone to enter the Options List.

2Select SIP Settings.

3Select NAT.

4Select Nortel.

5Select NAT Enabled.

Configuring the IP Phones

41-001129-00 Rev 09, Release 1.4.1 4-17