This is a Studer AES/EBU card (Part Number: A949.0424) designed for the D21m Modular I/O System. It offers 16-channel input and 16-channel output, providing excellent audio interface performance.

To use this Studer AES/EBU card, first make sure your D21m Modular I/O System is powered off. Then carefully insert the card into the appropriate slot. Once installed, power on the system. When using, ensure the audio source and destination are properly connected. As for maintenance, keep the card in a clean and dry environment. Avoid exposing it to extreme temperatures or humidity. If there are any issues, check the connections first. If the problem persists, contact Studer's customer support.