D-Link DPH-130S User Manual page 42

Undisturbed Mode
On
If you want to continue accepting calls but do not want to hear the ring
sound, you may mute the ring sound without otherwise effecting the
phone's operation:
DND Mute
>Ring Mute
Ring Mute:
On
5. Press the [ << ] or [ >> ] key until you see
"Undisturbed Mode On" displayed then
press the [Select] key.
1. Select "Ring Mute" in step 4 on the previous
page by pressing the [ << ] or [ >> ] key and
then pressing the [Select] key.
2. Press the [ << ] or [ >> ] key until you see
"Ring Mute: On" displayed then press the
[Select] key. The message indicator will still
light when there is an incoming call, you will
still be able to see the caller's name on the
LCD display, but the ringer will not sound.
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