What Is an SFP Module? Definition and Types
·1 min read·169 words
An SFP (Small Form-factor Pluggable) module is an interchangeable optical or copper transceiver inserted into a switch or router slot. It provides fiber or copper connectivity at various speeds (1G, 10G, 25G, 100G, 400G). It is an essential component of modern data center and campus networks.
SFP Families
- SFP (1G): 1000BASE-SX/LX/T, duplex LC or RJ45
- SFP+ (10G): 10GBASE-SR/LR/ER, LC
- SFP28 (25G): 25GBASE-SR/LR
- QSFP+ (40G): 4×10G
- QSFP28 (100G): 4×25G or single-mode
- QSFP-DD (400G): 8×50G
- OSFP: 400G alternative (NVIDIA)
Optical Interfaces
- SR: short-range multimode (OM3/4)
- LR: single-mode, 10 km
- ER: single-mode, 40 km
- ZR: single-mode, 80+ km (coherent 400G)
- BX: bidirectional over 1 fiber
Compatibility
- Cisco checks the EEPROM, and non-Cisco modules may be rejected
- OPTINOC: 100% compatible, certified, and correctly coded modules
- 50-80% savings compared with manufacturer-branded modules, with a lifetime warranty
DOM
Digital Optical Monitoring: real-time TX/RX power, temperature, and voltage. Supported by recent modules (-D or -S suffix).
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Cisco, Juniper, and FortiGate SFP/SFP+/SFP28/QSFP28/QSFP-DD transceivers, plus compatible OPTINOC modules (-50 to -80%). Quote within 2 hours.