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# Conditions for Bidirectional Communication

To support bidirectional communication, the following conditions must be met:

When connected with the network

- The Standard TCP/IP port is used, or the TCP/IP protocol or the IPP protocol is used. (When using the IPP protocol, the IPP port name must include the IP address.)

- [Enable bidirectional support] is selected, and [Enable printer pooling] is not selected on the [Ports] tab with the printer driver.

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.

- The PCL 6 and PostScript 3 printer driver support bidirectional communication and update the machine status automatically.

- The PCL 5e printer driver supports bidirectional communication. You can update the machine status manually.