SATO CL4NX Operator's Manual page 294

[Ports]
The setting items are as follows:
Port1
Set the port number.
Port2
Set the port number.
Port3
Set the port number.
Flow Control
Set the communication protocol.
Multiple connections
Set whether to receive connection requests from multiple hosts or applications.
Legacy Status for Port 9100
Set whether to change the return status format of port3 to legacy status.
◦ Does not appear if you have selected [None] in the [Flow Control] menu.
BCC
Set the BCC check function.
◦ Appears only if you have selected [Status5] in the [Flow Control] menu.
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[Network]