1. When you dial a wrong number, or some dials your line in error, and hear the screech of a fax machine attempting data transmission.
2. When your fax transmittal doesn't go through.
I just got an earful of fax noise. Must've been a faxident.
when you're trying to send a fax and suddenly the fax machine receives one.
I tried sending you that document be we had a faxident