How to stop telemarketers' calls with concealed caller ID's?

is there anyways to stop unwanted calls?

• im on the donotcall list but i get calls anyways, im not talking about telemarketers, im talking about people calling , dont talk or talk for a second and then wont talk after that, i dont have the type of phone to leave off the hook, and if i take it off my modem thats attached to the net so im not sure if i could still use the net, so anyways to stop this, im tired of being startled by phone calls that are unnecessary or worse having them call when im in the bathrm, any suggestions? i dont have caller id

• Answer:

  They suggest that you let the person go through their spiel and then tell them, very emphatically "do not call me again". They are "supposed" to honor that request. For those that don't, I have a loud whistle and blow it in their ear before I hang up. It may not solve anything but it makes me feel really good.