Panasonic KX-T7420 Operating Instructions Manual page 7

direction.*
Off-hook
D
* Lift the handset.
owm
rdi cim umber Keys
+ Press the SP-PHONE
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vutun
GO
On-hook
+
s
+
+ Replace the handset.
oe
Various tones are heard
«press the SP-PHONE
Cp
depending on the operation.
button.