If you're calling from a business line, the outgoing number should be the main line, not your direct line. If you're doing this on a cell phone, just block the

If you're calling from a business line, the outgoing number should be the main line, not your direct line. If you're doing this on a cell phone, just block the number. Yes, your answer rate will go down, and you'll have to leave voicemails, but eventually when they see a blocked number they'll think "oh it's probably kqr" which won't be any worse than an unknown number anyway. If they ask for your contact details, give them an email or whatever your preferred method is. You can't be tricked into giving out your cell phone. If you don't want to give it out - don't.