Canon MX450 series Online Manual page 22

To send the scanned document, press the OK button to start sending it.
Note
To send two or more pages, follow the message to load the next page, and press the
Color or Black button. After scanning all pages, press the OK button to start sending.
To cancel sending the fax, press the Stop button.
Note
When your machine is connected to a PBX (Private Branch Exchange) system, refer to the operating
instructions of the system for details on dialing the recipient's fax/telephone number.
In case the machine was not able to send a fax, such as when the recipient's line was busy, it has the
function to automatically redial the number after a specified interval. Automatic redialing is enabled by
default.
Automatic Redialing
Unsent documents, such as those pending redial, are stored in the machine's memory. They are not
stored in the case of a sending error.
Document Stored in Machine's Memory
Do not disconnect the power plug until all documents are sent. If you disconnect the power plug, all
unsent documents stored in the machine's memory are lost.