Fax tones and handshake; Black Start; Color Start- Page 44

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   INTRODUCTION

Fax tones and handshake

When someone is sending a fax, the machine sends fax calling tones 
(CNG tones). These are quiet, intermittent beeps every 4-seconds. 
You’ll hear them after you dial and press 

Black Start

 or 

Color Start

 and they will continue for about 60 seconds after 

dialing. During that time, the sending machine must begin the 
“handshake”, or connection, with the receiving machine.

Each time you use automatic procedures to send a fax, you are 
sending CNG tones over the phone line. You will 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 machine is set to the Fax Only mode, it will answer every call 
automatically with fax receiving tones. If the other person hangs up, 
your machine will continue to send the “chirps” for about 40 seconds, 
and the LCD continues to show 

Receiving

. To cancel receiving, 

press 

Stop/Exit

.

The fax ‘handshake’ is the time in which the sending machine’s CNG 
tones and the receiving machine’s “chirps” overlap. This must be for 
at least 2 to 4 seconds, so both machines can understand how each 
is sending and receiving the fax. The handshake cannot begin until 
the call is answered, and the CNG tones only last for about 60 
seconds after the number is dialed. So it is important for the receiving 
machine to answer the call in as few rings as possible.

When you have an external Telephone Answering Device (TAD) 
on your fax line, your TAD will decide the number of rings before 
the call is answered.