48 sec of a beep

Number calls continuously, when answered there is only a beep noise that is repeated, and no human physically speaks.

fax beeping, calls multiple times

Scammers will call from unrecognised numbers and upon answering the phone you may hear a 'beeping' noise, yet there's no one on the other line. This is a common tactic used to ascertain whether or not your phone number is active and is therefore a target for future scam calls