AASTRA 6700i series, 9143, 9480i, 9480i CT SIP Administrator Guide EN - Manual (Page 351)

5-74 41-001343-01 Rev 03, Release 3.2.2
Aastra Web UI
1 Click on Basic Settings-> Preferences->General.
2 The "Play Call Waiting Tone" field is enabled by default. To disable this field, uncheck the box. This
feature allows you to enable or disable the call waiting tone on the IP phone.
Note: The Call Waiting Tone feature works only if the “Call Waiting” tone field is enabled at the
location Advanced Settings->Global SIP (or Line X)->Basic SIP Authentication Settings.
3 Click to save your changes.