The CS connector is a duplex FO connector in an extremely compact design. It belongs to the VSFF connectors
Very Small Form Factor(VSFF), to which the
connectors, which belongs to the SFF connectors, Small Form Factor (SFF), the port density can be doubled.optical fibres are guided in a ceramic ferrule
with a diameter of 1.25 mm and a spacing of 3.8 mm. TheCS connector can be stacked extremely densely, which helps to increase the connection density.
The CS connector was developed for 200 Gigabit Ethernet (200GbE) and 400 Gigabit Ethernet (400GbE). Compared to the classic LC connectors, it is characterized by good insertion loss and return loss.