AASTRA 6700i series, 9143, 9480i, 9480i CT SIP Administrator Guide EN - Manual (Page 652)

41-001343-01 Rev 03, Release 3.2.2 6-25
Configuring Whitelist Proxy Using the Aastra Web UI
Use the following procedure to configure the Whitelist Proxy feature using the Aastra Web UI.
Aastra Web UI
1 Click on Advanced Settings->Global SIP->Advanced SIP Settings
2 The "Whitelist Proxy" field is disabled by default. To enable this field, check the box.
When this feature is enabled, an IP phone accepts call requests from a trusted proxy server only. The
IP phone rejects any call requests from an untrusted proxy server.
3 Click to save your changes.