Canon MF229dw User Manual page 348

ECM must be enabled on both the machine and the other fax device because error checks are performed on both the
sending and receiving devices.
Even when ECM is enabled, errors may occur due to telephone line conditions.
It may take a longer time than usual to process data when ECM is enabled because the error checks and corrections are
performed while the data is transmitted.
<Menu>
Set Pause Time
For example, when you make calls by dialing "0 - (pause) - (telephone number)", 0 is dialed first and then a few seconds later, the
telephone number. When sending faxes overseas, you need to specify destinations by dialing "(international access code) - (country
code) - (area code) - (fax number)" but consecutive numbers that are input without pauses may not be recognized correctly. In this
case, try adding a pause after the international access code or the fax number. If the code or the number is still not recognized
correctly, change the duration of the pause. For instructions on how to enter a pause, see step 3 on
1 to 4 to 15 (sec.)
<Menu>
<Apply>
*1
Auto Redial
Specify settings for Auto Redial, a function that automatically redials the fax number after several minutes if the first attempt fails
because the line is busy. You can specify how many times the machine redials and the interval between redials.
Off
On
No. of Times to Redial
1 to 2 to 10 (times)
Redial Interval
2 to 99 (min.)
Redial When Err Occurs
Off
On
<Menu>
<Apply>
<No. of Times to Redial>
Specifies how many times the machine redials. Use
<Redial Interval>
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<Fax Settings> <TX Function Settings>
<Fax Settings> <TX Function Settings>
<Fax Settings> <TX Function Settings>
<ECM TX> <On>
<Set Pause Time> Specify the duration of pause
<Auto Redial> <On>
/ or the numeric keys to enter a number, and tap <Apply>.
Sending Faxes.
Specify the settings