With the 2009 DECT 6.0 cordless phones from Panasonic you can store the Caller ID info of any and all unwanted callers into your phone's Call Block list. This eliminates all future annoying calls from them -- once their information is stored, they'll get a busy signal if they call you again.
Available on these models: KX-TG7434B, KX-TG7433B, KX-TG7432B, KX-TG7431B
