Interesting. I have never had a call like that, but do get plenty of those
annoying telemarketer calls where when you answer the telephone, there is
dead silence and then (it seems like 10 seconds) someone says "Hello, is
this Mister So and So?".
I think if I had to get calls from telemarketers, I would rather get the
type you are getting that doesn't keep you hanging on the line waiting to
see if someone is at the other end of the line.