Troubleshooting guide

8-2 Optiset E Administrator Guide
Note:
If your extension appears on another telephone (a multiple line
appearance), that telephone must also be in Do Not Disturb
mode for your extension to be in Do Not Disturb mode. If the
other telephone is not in Do Not Disturb mode, calls to your
extension will continue to ring at the other telephone.
The following features override Do Not Disturb mode:
Bridged Call, Buzz, Com Group Call, Intercom Call, and
Speaker Calls (except Two-Way Speaker Call).