The 7250 IXR-X1 is fanless or uses front-to-back airflow (depending on PSU model). Always match the airflow direction of transceivers with the chassis airflow.
: Connect to a -48V or -60V DC power source, ensuring correct polarity. 4. Connect Management and Console nokia 7250 ixr x1 installation guide
Expected output: oper-state = up , speed = normal . The 7250 IXR-X1 is fanless or uses front-to-back