Aastra 9143i Series Administrator's Manual page 521

Aastra Web UI
6 Click
The change takes effect immediately without a reboot.
7 Click on Operation->Softkeys and XML;
or
Click on Operation->Programmable Keys;
or
Click on Operation->Expansion Module.
Softkeys 1 and 2 configured for DND
Note: If there is no DND key configured or if it is removed, DND is disabled on the IP Phone.
8 Click
41-001160-04 Rev 02, Release 2.5
to save your changes.
to save your changes.
Configuring Operational Features
Operational Features
5-215