In the following how to video we will show you how to Block a range of telephone numbers, when entered in the telephone will block calls that begin the stored numbers in the block list, such as toll free phone number prefixes or certain area codes. This video applies to the Panasonic cordless telephone series KXTGM4.
Models
KX-TGM420W
KX-TGM430B
KX-TGM450S
KX-TGM470W
KX-TGM490S

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