Canon PIXMA MX850 Quick Start Guide - Page 168
Errors Often Occur When You Receive a Fax, Refer to ECM RX in Device
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Cause Action ECM sending/receiving is not enabled although the line/connection is poor, or the sender's fax machine is not compatible with ECM. z On your machine, set ECM RX to ON. Refer to "ECM RX" in "Device Settings" of the User's Guide on-screen manual. z Contact the sender and check that his/her machine is set to enable ECM sending. z If the sender's or recipient's fax machine is not compatible with ECM, the fax will be sent/received in the standard mode. z Reduce the reception start speed. Refer to "RX start speed" in "Device Settings" of the User's Guide on-screen manual. Errors Often Occur When You Receive a Fax Cause The telephone line condition or the connection is poor. The sender's fax machine is not operating normally. Action If there is a poor line or connection, reducing the reception start speed may correct the error. Reduce the reception start speed. Refer to "RX start speed" in "Device Settings" of the User's Guide on-screen manual. Contact the sender and check whether his/her fax machine is operating normally. 164 Troubleshooting