Fiberpark's passive devices & module include CWDM devices / modules, DWDM devices / modules, PLC devices / modules ,isolators, optical attenuators,etc. Those are all Fiberpark's feature products. Fiberpark have regid manufacturing standard. That is in order to keep high quality and stability of production. Fiberpark's WDM products have passed the strictest testing of Telcordia. Passive devices is the core component in network. Good quality passive devices, will maitain the stabilizatioin of the network.