Someone called from this number.  The number did not display, but the phone "spoke" the number and when I picked it up, there was no voice on the other line - although it looked like the line was open.  Then while I was looking up the number, another call came in - this time the phone reported "private number".  

I immediately asked who was calling and the voice (thick Indian accent) said it was Dan Johnson from Alarm Security (or a similar name).  Funnily, a few days ago a Dan Johnson called from another company.  

I said as much and the caller said no.  I said yes it's true and the caller said "sorry" and hung up.

Same deal here. I just don't answer these calls anymore

Same deal - no one there when I picked up.

Call came in no one on the other end. Redialed the number and the message said all circuits busy. Some type of scam?

Same here, I got to buy a security system to keep telemarketers at bay.