The cabinet with heat exchange is constituted by 19inch standard cabinet and heat exchange installed in side wall or top. The heat exchange of this cabinet is this enterprise has the proprietary intellectual property rights high tech product, which using an invention and much new practical patent technology, good capacity of heat exchange .Enclosure is IP55. .This equipment making two air circuits to isolate the internal and external airflow, ensure fully air-tight cabinet inner heat output. Can offer cabinet inner equipments airflow and clean working condition.  Adopt fully isolated from external heat exchange, offering inner equipments good heat output condition ,in order to protect these telecommunication equipment from external dust,vapor and aggressive gas. The external circuit fan connecting with external, enclosure is IP54. Heat exchange’s external circuit channel has been strict protection engineering. So the product has no dust gauze, which needs often change and maintenance. Maintenance free.   The heat exchange of cabinet or distribution box has system controlled by SCM, which intelligent control the heat exchange. The system can give an alarm by 4ways, when there is fault .Offing the information for maintainer.