Press the [OK] button
Go with the arrowkeys to [HS INST].
press OK Go with the arrowkeys to [RING INST] and press OK
Go with the arrowkeys to [EXT BEL] and press OK
Go with the arrowkeys to [RING FULL] and press OK
This is the volume, adjust it with the arrowkeys. The maximum volume is 5 To leave the menu, press the red handset several times.
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