According to some examples, a bay is provided to receive at least a portion of a housing of a removable device, where the bay includes a management controller to communicate a management signal to the removable device received by the bay, and a cooling mechanism to provide airflow to the removable device received by the bay. The removable device may be one that receives an optical cable, receives an electrical cable, converts a first optical signal received through the optical cable to a first electrical signal transmitted through the electrical cable, and converts a second electrical signal received through the electrical cable to a second optical signal transmitted through the optical cable.