Aastra 6755i - Using a Headset

146 Model 6755i IP Phone User Guide
Line Keys, Programmable Keys, and Softkeys
The phone opens a multicast RTP session and an outgoing OR incoming phone screen
displays as follows.
2. Press the Drop key to end the multicast RTP session and return to the idle screen.
Note: If you enable global DND on the phone, the incoming multicast RTP session
is dropped.
Paging
Drop
00:01