About Fax Machines; Fax Tones And Handshake - Brother MFC-4820C User Manual

About fax machines

If you've never used an MFC before, it might seem a little mysterious.
But you'll soon recognize the unusual fax tones on your phone line,
and be able to send and receive faxes easily.

Fax tones and handshake

When someone is sending a fax, the MFC sends fax calling tones
(CNG tones). These are quiet, intermittent beeps every 4-seconds.
Fax Start
You'll hear them after you dial and press and they will
continue for about 60 seconds after dialing. During that time, the
sending machine must begin the "handshake" with the receiving
machine.
Each time you use automatic procedures to send a fax, you are
sending CNG tones over the phone line. You'll soon learn to listen for
these quiet beeps each time you answer a phone on your fax line, so
you will know if you are receiving a fax message.
The receiving fax responds with fax receiving tones, which are loud,
chirping sounds. A receiving fax chirps for about 40 seconds over the
phone line, and the LCD shows RECEIVING.
If your MFC is set to the FAX ONLY mode, it will answer every call
automatically with fax receiving tones. If the other person hangs up,
your MFC will continue to send the "chirps" for about 40 seconds,
and the LCD continues to show RECEIVING. To cancel receiving,
Stop/Exit
press .
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