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# Checking Whether Bidirectional Communication is Working or Not

Follow the procedure below to check if bidirectional communication is working by obtaining the printer version information.

1. Open the printer properties dialog box.

2. Click the [Maintenance] tab.

3. Click [About].

   The [About] dialog box appears.

4. Check that the printer version is displayed.

   When bidirectional communication is working, the printer version is displayed.

5. Click [OK].

   - The printer version appears under [System Version:].

Requirements for Bidirectional Communication

If bidirectional communication is working between the printer and computer, information about the paper loaded in the printer is sent to the computer and is applied automatically to the printer properties settings. In addition to that, the printer status can be checked from the computer.

- The computer must support bidirectional communication.

- The bidirectional communication settings must be enabled in the printer properties.

- The printer and computer must be connected using a USB cable.

- Opening from the Start Menu

- Opening from an Application