Xerox WorkCentre M24-3946 - Manual (Page 59)

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3.6
Transmission Failure
Redial
When the line is busy and the remote machine is engaged for example, the
machine can automatically redial. This function is called redial.
ECM
Error Correction Mode (ECM) is the error correction method defined by ITU-T for
G3 communication. Terminals with ECM mutually check whether the transmis-
sion is successful. If not, the transmitted data is returned to the sender.
This enables communication without fax image defects caused by line noise.
ECM on the Activity Report refers to ECM communication.