The SFP+ is the enhanced small form-factor pluggable. SFP 10GB transceivers are interchangeable with SFP transceivers and can be used in the same cages as SFP transceivers. For 10 Gbps applications, SFP 10GB Optics have a smaller footprint and lower power consumption than XFP transceivers. The electrical interface to the host board for SFP and SFP+ modules is a serial interface. It will support 8 Gbit/s on Fibre Channel and 10 Gbit/s on Gigabit Ethernet and Optical Transport Network standard OTU2. The optics always have a Tx side (sending laser) and a Rx side (receiver). The difference between the sending power (in dB) and the receiving power (in dB) is called the power budget and will determine the distance an optic can cover, where also the laser light (in nanometers) has an important role. The SFP 10G is available in SFP+, CWM SFP 10Gb, DWDM SFP+ 10Gb. The SFP 10GB is also available as a BIDI optic, which has only 1 LC plus and will work on 1 single strand of Single Mode fiber.