GBICs

GBIC stands for Gigabit Interface Converter. It is a standardized, hot-pluggable module used in Gigabit Ethernet networking. GBICs are designed to convert electrical signals into optical signals and vice-versa, allowing network devices like switches and routers to connect to fiber optic cables. They feature a specific form factor and an LC connector for the fiber optic cable. The primary advantage of the GBIC was its modularity, enabling network administrators to easily swap out transceivers for different fiber types (multimode or single-mode) and distances without replacing the entire network device. While GBICs were widely adopted, they have largely been superseded by smaller, more compact form factors like SFP (Small Form-factor Pluggable) modules. SFP modules offer similar functionality but in a significantly reduced size, allowing for higher port densities on networking equipment. However, the fundamental principle of a hot-swappable transceiver to connect network interfaces to various media types originated with the GBIC.