About Fax Machines; Fax Tones And Handshake - Brother MFC-7420 User Manual

Chapter 1
Note
When you put paper in the manual feed slot,
please remember the following:
■
The side to be printed on must be face up.
■
Put the leading edge (top of the paper) in
first and push it gently into the slot.
■
Make sure that the paper is straight and in
the proper position on the manual feed
slot. If it is not, the paper may not be fed
properly, resulting in a skewed printout or
a paper jam.
■
Do not put more than one sheet or
envelope in the manual feed slot at a time
or you may cause the machine to jam.
■
You can remove smaller sizes of printed
paper from the output paper tray more
easily if you lift the scanner cover using
both hands as shown in the illustration.
You can still use the machine when the
scanner cover is raised. You can return
the scanner cover to its home position by
pushing it down with both hands.
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About fax machines

Fax tones and handshake

When someone is sending a fax, the fax
machine sends fax calling tones (CNG
tones). These are quiet, intermittent beeps
every 4-seconds. You'll hear them after you
dial and press Start and they will continue for
about 60 seconds after dialling. 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 dialled.
So it is important for the receiving machine to
answer the call in as few rings as possible.