Ecm (Error Correction Mode) - Brother MFC-3100C Owner's Manual

The receiving fax responds with fax receiving tones—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 mode, it will answer every
call automatically with fax receiving tones. Even if the other party hangs up,
your MFC continues to send the "chirps" for about 40 seconds, and the LCD
continues to display RECEIVING. To cancel the receiving mode, press
Stop/Exit.
The fax "handshake" is the time in which the sending machine's CNG tones and
the receiving machines "chirps" overlap. This must be for at least 2 to 4 seconds,
so the 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. Therefore, it's 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
Note
line, your TAD will determine the number of rings before the call is answered.
Pay special attention to the directions chapter for connecting a TAD to your
MFC in Chapter 2, .
Assembly and Connections

ECM (Error Correction Mode)

The Error Correction Mode (ECM) is a way for the MFC to check the integrity
of a fax transmission while it is in progress. ECM transmissions are possible
only between machines that both have the ECM feature. If they do, you may
send and receive fax messages that are continuously checked for their integrity.
Sufficient memory must be available in your MFC for this feature to work.
1 - 6
I N T R O D U C T I O N