Received on Voice mail: someone pushed a fax send button.

We have a answering service that we pay by the minute on.  We get a call from them 3 times a week, so it's even costing us money. The phone message always says hang up.

We get multiple calls per week from this number and it is a fax machine trying to connect.  It is probably searching for valid fax machine numbers to fax junk mail.

We receive calls from this number once or twice a week.  Whenever we pick up, a recording says "That was not a valid response" and hangs up.

This number calls 3 times a day as late as 11 pm at night. EVERYDAY. Nothing but a loud peep when the answering machine picks up.

Let ring until answering machine picked it up, then a FAX came on.