Canon imagePROGRAF PRO-6600 Online Manual page 638

If you are using any programs that switch between network environments, check their settings.
If printer is connected to an AirPort Base Station via LAN, make sure you use
Check 10
alphanumeric characters for network identifier (SSID). (macOS)
If the problem is not resolved, redo setup.
• • For Windows:
Perform setup using the Setup CD-ROM or from Setup Guide.
• • For macOS:
Perform setup from Setup Guide.
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