Panasonic EB-GD75 Operating Instructions Manual page 36

Phone Security
"Wild" Numbers
Wild numbers are spaces that can be stored in a phone number. The "wild"
numbers must be filled before the phone number is dialled. Used in
conjunction with Fixed Dial calls can be restricted, for example, to a specific
area by storing the area code of a phone and when recalled the remainder
can be added. The "wild" numbers can be anywhere within a stored phone
number.
1 Z + Hold 0 until _ is displayed to enter a wild number
2 When the phone number is recalled pressing a numeric key will fill
in a "wild" number
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