IBM 21H9870-3 Serial Optical Converter Fibre Channel Gbic, 21H9837, 3702303, 21H9870

Product Description

The IBM 21H9870-3 is a Serial Optical Converter, commonly known and utilized as a Fibre Channel GBIC (Gigabit Interface Converter) module. This device plays a critical role in Fibre Channel storage area networks (SANs) by performing the essential function of converting electrical serial data signals into optical signals for transmission over fiber optic cables, and vice versa. Its primary purpose is to enable connectivity between Fibre Channel host bus adapters (HBAs) or switches and the fiber optic cabling infrastructure. This GBIC module is designed to be hot-pluggable, meaning it can be inserted or removed from a compatible GBIC slot in IBM networking or storage equipment without requiring the system to be powered down. This feature is crucial for maintaining network uptime and facilitating maintenance or upgrades without service interruption. The 21H9870-3 is associated with several other part numbers, including 21H9837, 3702303, and 21H9870, indicating potential revisions or related components within the same product family. As a component of Fibre Channel networking, the IBM 21H9870-3 would have been specified for particular data rates (e.g., 1Gb/s, 2Gb/s, 4Gb/s) and optical characteristics (wavelength, fiber type, connector type) depending on the specific application and the equipment it was paired with. It represents a vital link in the chain of data transmission for storage networks, ensuring reliable and high-speed communication between servers and storage devices.