Aastra Telecom 9480i Series - Manual (Page 682)

Advanced Operational Features
6-12 41-001160-03, Rev 00, Releaes 2.4
IP Phone Administrator Guide
Aastra Web UI
Step Action
1 Click on Advanced Settings->Global SIP->RTP Settings.
2 Enable the "Two Call Support" field by checking the check box.
(Disable this field by unchecking the box).
3 Click to save your settings.
Note: The session prompts you to restart the IP phone to apply the configuration settings.
4 Select Operation->Reset and click .
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