1. Saving protection resource 2. Short reponse time           1. Protection switching 2. Network switching 3. Restoration and reconfiguration 4. Performance monitoring 5. Fiber optic maintenance and testing 6. Optical add/drop switching 1.As a Protection Module: Using this switch card along with other optical/communicational modules in an optical communication network If one of other optical/communicational modules fails, network manager can switch the transmitted route to the backup one through this switch card. Application area: optical/communication networks. 2.For Testing Purpose: In a testing system, we avoid to switch the ON/OFF buttons all the time and avoid the connector pull/plug actions as many as possible Using this switch card module as an inserted switch to avoid switching the testing instruments or under testing devices directly. Application area: testing systems, laboratories, schools.