Ecm (Error Correction Mode); Connecting The Machine; Connecting An External Telephone - Brother MFC-3220C User Manual

ECM (Error Correction Mode)

The Error Correction Mode (ECM) is a way for the machine to check
a fax transmission while it is in progress. If the machine detects
errors during fax transmission, it resends the pages of the fax that
had an error. ECM transmissions are only possible between fax
machines that both have this feature. If they do, you may send and
receive fax messages that are continuously being checked by the
machine.
Your machine must have enough memory for this feature to work.

Connecting the machine

Connecting an external telephone

If your machine does not have a handset, you can connect a
separate telephone (or telephone answering device) directly to your
machine as shown in the diagram below.
Connect the modular plug on the telephone line cord to the jack
labeled EXT. in the back of the machine.
When this phone (or TAD) is in use, the LCD shows Telephone .
(MFC-3220C)
Extension
Telephone
External
Telephone
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