Konica Minolta bizhub C550 - Manual (Page 206)

Useful transmission functions 6
C550 6-47
6.14 Sending a fax after cancelling ECM mode (ECM OFF)
ECM OFF
ECM OFF is a function to send a fax after cancelling the ECM mode and
shortening the communication time.
ECM mode is provided for communication of error resending method decid-
ed by ITU-T (International Telecommunication Union). In the communication
between faxes with the ECM mode, as the communication is carried out
while confirming that there is no error in the sent data, image disarry due to
static in the telephone line can be prevented during communication.
In this machine, a fax is sent by ECM mode till ECM OFF is specified.
2
Note
Following functions cannot be used simultaneously.
Polling RX, Polling TX, V. 34 OFF, Bulletin board registration, Bulletin
board Polling RX.
When there is a lot of static in the telephone line, communication time
might be longer as compared to when the ECM mode is set to ECM OFF.