A 19-inch rack is a standardized frame or enclosure for mounting multiple equipment modules. Each module has a front panel that is 19 inches (482.6 mm) wide, including edges or ears that protrude on each side which allow the module to be fastened to the rack frame with screws, which was used widly in the building and the indoor and outdoor cable connection.

Parameters:
Environment temperature: -25deg~+55deg
Relative humidity: <85%
Atmospheric pressure: 70~106kpa
Insulation resistance: ≥ 2*104MΩ /500VDC
Anti-voltage: 3KVDC/1MIN
Max capacity: 12/24/48
Connector type: FC/SC/LC
Applicable cable: 2.0/3.0/0.9
Installatino type: On the wall/rack installation