This Crestron card interface comes with three C3COM - 3 cards installed. It's important to note that it does not include a power supply.

To use this Crestron CEN - CI3 - 3 Card Interface, first make sure you have a suitable power supply as it's not included. Install the three C3COM - 3 cards if they aren't already in place. When using it, avoid exposing it to extreme temperatures or humidity. For maintenance, keep it clean and dust - free. Regularly check the cards for any signs of damage. If you encounter any issues, contact Crestron support.