Life is full of choices. When it comes to transceivers, there are also a wide range of modules that you can choose from, such as GBIC, SFP, SFP+, QSFP, CFP and other modules. While, when referring to Gigabit interface module, SFP module will usually come into our mind firstly. As a matter of fact, we have automatically neglected another Gigabit interface module: GBIC. So why would GBIC be gradually replaced by SFP? What are their common points and differences? The answers will be discussed in more detail at a later stage. The Conception of GBIC and SFP/Mini GBIC GBIC stands for Giga Bitrate Interface Converter which was quite popular in 1990s. The design can be used for hot plug with SC interface. The devices are economical since they help make the unnecessity for replacing entire boards at the system level a reality. By offering a standard and hot swappable electrical interface, one gigabit port can support a diverse range of physical media from copper to lon...