The SFP+ Single-Mode Optical Module is a 4Gb/s Short-Wavelength Transceiver designed for use in bi- directional Fiber Optic Channel links. The modules are hot-pluggable and operate with 3.3VDC. Each Input and Output card contains rows of SFP+ modules that serve as the fiber-optic couplers for the fiber cables to and from the Thinklogical Tx and Rx Extenders. Individual cards can be removed for ease of access to the SFP+ modules. Always use dust caps to protect against damage when a fiber optic connector is not attached to its coupling device (fiber optic equipment, bulkheads, etc.)