Yealink SIP-T20 - Manual (Page 75)

Basic Call Features
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Incoming calls will be rejected automatically and "n Missed Call" ("n" indicates the
number of the missed calls) will appear on the LCD screen.
To activate DND in custom mode:
1. Press .
2. Select Features->DND Code.
3. Press or to select the desired account from the DND Account field.
4. Select Enable from the DND field.
5. (Optional.) Enter the DND on code and off code respectively in the DND On Code
and DND Off Code field.
6. Press to accept the change.
The icon appears on the idle screen and the prompt ―DND: ―appears in front of
the associated account.
Incoming calls on this line will be rejected automatically and "n Missed Call" ("n"
indicates the number of the missed calls) will prompt on the LCD screen.
Note
1 Missed Call
18 Jan 20:35
2. DND:
◄ Enable ►
1 Missed Call
18 Jul 20:35
DND: 1008
18 Jan 20:30
The prompt message displays only if Missed Call Log for the line is enabled. Missed Call
Log is configurable via web user interface at the path Account->Basic.
Do Not Disturb is local to the phone, and may be overridden by the server settings. For
more information, contact your system administrator.