JUST TO EVERYONE WHO WANT TO BLOCK OUT UNWANTED CALLS, CAN CHECK OUT THE FOLLOWING PRODUCTS...
"http://www.digitone.com/Digitone%20Call%20Blocker.htm"

OR  A LATEST MODEL FROM PANASONIC....GO TO THEIR SITE AND ENTER YOUR MODEL NUMBER TO VIEW THE MENU....SEE CALL BLOCKING FEATURE IS AVAILABLE OR NOT....
"http://www2.panasonic.com/consumer-electronic ... elephones.75500"

OR A LATEST MODEL FROM UNIDEN
"http://www.cordless-phone-update.com/uniden-cordless-telephone.html"
"http://www.amazon.com/Uniden-Cordless-Answering-Handsets-DECT2185-3/dp/B001W0Y4E0/ref=sr_1_2?ie=UTF8&qid=1307824135&sr=8-2"

PANASONIC CAN BLOCK 30 CALLS, UNIDEN CAN BLOCK OUT 20.....