Matsushita Electric KM40108849C3, Service Manual

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5.4. Dial Lock
You can prevent others from making a call to any number except the one pre-programmed in
the memory of the EMERGENCY button. Once you locked the dialing buttons, even emergency
numbers cannot be dialed. Only incoming calls are accepted until the dial lock is canceled.
Before using this feature, we recommend storing an emergency number in the memory of the
EMERGENCY button. Even if the dialing buttons are locked, the number stored in the button can
be dialed.
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