Dial Pad Confirmation Tone - NEC i-Series Alphanumeric Display Feature Handbook

When you enable Dial Pad Confirmation Tone for your extension, you
hear a beep each time you press a dial pad key. This beep reminds you
that you have pressed a key. The confirmation tone is particularly
helpful for Intercom calls and calls on Dial Pulse lines. For these types
of calls, you don't hear tones echoed back to your handset or speaker
to confirm your dialing.
To enable or disable
Dial Pad Confirmation

Dial Pad Confirmation Tone

1.
You hear confirmation beeps.
Tone:
2.
+
to hang up.
.
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