Automated call screening feature to block automated dialers

I have this phone on my land line. AT&T Cordless Phone with Smart Call Blocker. Unless I have programmed in your phone number, or your name as shown by caller id (we can get a call from any Walgreens regardless of phone number), you must press the "#" key or my phone won't ring. Works like a champ. I have not gotten a robocall on the landline in over a year. I only know they come in because they show up as missed calls in the caller id list.

(I got mine cheaper at Sams Club.)