Canon i-SENSYS LBP6670dn User Manual page 177

Press [ ] ( : Online).
The (Online) indicator goes off, and the printer is offline.
IMPORTANT
About the automatic online function
You can specify the time interval until the printer automatically enters the online status. The default is [2 minutes].
[Setup] Menu ([Control Menu] Options)
The printer does not automatically enter online status in the following cases.
The printer is in error status.
The printer is in Sleep mode.
[Auto Reset Time] under [Timer Settings] is set to [Off].
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