Sharp MX-3610N User Manual page 226

As shown here, if Tandem Copy is enabled using a function provided in the
master machine and not provided in a slave machine, a message will appear.
If a machine runs out of paper
If either the master machine or the slave machine run out of paper, the machine
that ran out of paper will hold the job while the machine that still has paper
continues the job. When paper is added to the machine that ran out, the job
resumes.
If user authentication is specified
Tandem Copy is enabled when user authentication is specified in the master
machine.
Tandem Copy is disabled when user authentication is specified in the slave
machine while it is not specified in the master machine.
To use Tandem Copy:
In "Setting mode", select [System Settings] → [Device Control] → [Tandem
Connection Setting].
Index Contents Operation