Conditions for Bidirectional Communication
To support bidirectional communication, the following conditions must be met:
When connected with the network
The Standard TCP/IP port must be used.
In addition to the above, one of the following conditions must also be met:
The TCP/IP protocol or the IPP protocol is used. (When using the IPP protocol, the IPP port name must include the IP address.)
When connected with USB
The machine must be connected to the computer's USB port using the USB interface cable.
The computer must support bidirectional communication.
[Enable bidirectional support] must be selected, and [Enable printer pooling] must not be selected on the [Ports] tab with the printer driver.