Panasonic KX-PRW120AZ Operating Instructions Manual page 17

answered, but all other functions are disabled
while key lock is on.
To turn key lock on, press MMenuN (right soft
key) for about 3 seconds.
R To turn key lock off, press MKey lockN (right
soft key) for about 3 seconds.
Note:
R Calls to emergency numbers cannot be
made until key lock is turned off.
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Making/Answering Calls
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