Yealink SIP-T38G - Manual (Page 85)

Basic Call Features
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then press the Resume soft key to retrieve the desired call.
If more than two calls are on hold, an indication appears on the LCD screen, for
example "2/4", indicating that this is the second call out of four calls.
If multiple calls are on hold on more than one line keys, you can view the details of the
calls by pressing the corresponding line key, and then press the Resume soft key to
retrieve the call.
You can use the DND feature to reject the incoming calls automatically on the phone
and the callers can hear a busy signal or a message depending on your server.
To activate DND feature on the SIP-T38G IP phone:
1. Press the DND soft key when the phone is idle.
The icon on the idle screen indicates that the Do Not Disturb mode is enabled.
Incoming calls will be rejected automatically and "n New Missed Call(s)" ("n"
indicates the number of the missed calls) will prompt on the LCD screen.
Note
To specify the DND authorized numbers via web user interface:
1. Click on Phone->Features.
2. Click the “+” sign on the left of the Do Not Disturb to expand the feature list.
3. Enter the numbers in the Authorized Numbers (comma separated) field. For
multiple numbers, enter a "," between each number.
4. Click Confirm to accept the change.
If DND mode is enabled on the phone, the phone can still receive the incoming call from
the numbers specified in the Authorized Numbers (comma separated) field.
The Do Not Disturb feature is local to the phone, and may be overridden by the server
settings. For more information, contact your system administrator.