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41-001343-02 REV04 – 05.2014 4-27
SIP and TLS Source Ports for NAT Traversal
A System Administrator can configure the SIP and TLS source ports on the IP Phone. Previously, the IP phone used default
values (5060 for UDP/TCP and 5061 for TLS). The two new parameters for configuring the SIP and TLS source ports are:
• sip local port
• sip local tls port
You can configure the SIP and TLS source ports using the configuration files or the Aastra Web UI. After configuring these
parameters, you must reboot the phone.
If NAT is disabled, the port number also shows in the VIA and Contact SIP headers.
2. Press the Advanced softkey.
3. Enter the Administrator password using the keypad. Default is “22222”.
4. Select Network > NAT.
5. In the NAT IP field, enter the public IP address of your NAT device in dotted-decimal format.
6. In the NAT SIP Port field, enter the public SIP signaling port number of your NAT device. Default is 51620.
7. In the NAT RTP Port field, enter the RTP Port number of your NAT device. Default is 51720.
8. Press the Save softkey.
9. Restart the phone for the selection to take affect.
Aastra Web UI
1. Click on Advanced Settings->Network->Advanced Network Settings.
2. Enter a NAT IP address in the "NAT IP" field. The value must be entered in dotted decimal format.
For example, 0.0.0.0. The “NAT IP” is the public IP address of your NAT device.
3. Enter a NAT port in the "NAT SIP Port" field. Default is 51620.
The “NAT SIP Port” is the public SIP signaling port number of your NAT device.
4. Enter a NAT port in the "NAT RTP Port" field. Default is 51720.
The “NAT RTP Port” is the RTP Port number of your NAT device.
5. Click Save Settings to save your settings.
IP Phone UI