Oki ES8453 MFP User Manual - page 899
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1.
Press [Device Settings] on the touch panel.
2.
Press or several times and press [Admin Setup].
3.
Enter the administrator name and password and press [OK].
The factory default administrator name and password are "admin" and "aaaaaa"
respectively.
4.
Press or several times and press [Management].
5.
Press [Sound Control].
6.
Press [JAM Buzzer Volume].
7.
Select a volume level.
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