21H9872 is an IBM SOC-1063N Fibre Channel short-wave optical GBIC transceiver designed for legacy 1Gbps-class Fibre Channel SAN connectivity. It operates at 1063 MBd (1.063Gbps) over multimode fibre using an SC/PC optical interface and supports Fibre Channel and Fibre Channel Arbitrated Loop (FC-AL) applications. IBM cross-references this part with 21H9837, 234456-003, 234458-001, and 23L3336.
- Part Number: 21H9872
- Manufacturer: IBM
- Product: SOC-1063N Fibre Channel Short-Wave Optical GBIC
- Transceiver Type: GBIC
- Fibre Channel Speed: 1.063Gbps / 1063 MBd
- Wavelength: 850nm short-wave
- Optical Interface: SC/PC duplex
- Fiber Type: Multimode fiber
- Maximum Distance: Up to approximately 500–550m, depending on fiber specification.
- Laser Type: VCSEL
- Application: Fibre Channel SAN and FC-AL storage networking
- Compatible Equipment: IBM Fibre Channel switches, HBAs, storage systems and other equipment supporting the SOC-1063N GBIC
- Hot-Plug: Yes; GBIC modules are designed for field replacement/configuration.
- Related Part Numbers: 21H9837, 21H9839, 23L3336, 234456-003, 234458-001
- Equivalent Module: IBM/JDS Uniphase SOC-1063N
- Included: 1 × short-wave Fibre Channel GBIC transceiver
- Compatibility Note: This is a legacy 1Gbps-class Fibre Channel GBIC, not an SFP/SFP+ module and not a standard Ethernet-only 1000BASE-SX transceiver.
