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.

Is when an item of Fairfax and Favor is "accidentally" purchased. Typically happens after a few glasses of vino and a flick through the Fairfax and Favor club page.

when you're trying to send a fax and suddenly the fax machine receives one.