How to unblock numbers that have blocked? - Panasonic KX TGA641 Cordless Phone

Is this for the cordless phone? If so try this..

Step 1 Press the "Menu" button followed by the "#" key on the handheld unit.
Step 2 Enter "217" on the numeric keypad to access the blocked numbers menu.
Step 3 Press the down arrow on the keypad. Scroll through the list to select the number you wish to unblock.
Step 4 Press the key under "Erase" to remove the phone number from the list.
Step 5 Select "Yes" to confirm your selection.