The 1.25G SFP transceiver family encompasses all Gigabit Ethernet (1000BASE‑X, BX, LX, SX, ZX) and 1G Fibre Channel applications, delivering reliable 1.25 Gb/s links over single‑mode and multimode fiber in compact SFP form factor.
Fully compliant with IEEE 802.3z and SFP MSA, these hot‑pluggable modules offer low‑power operation and long distance reach from hundreds of meters to 120 km.
Under this category, you will find both 1000BASE SFP (duplex LC models) and 1000BASE‑BiDi SFP (single‑fiber simplex LC models), ensuring complete coverage for Gigabit Ethernet, metro optical access, FTTx, and enterprise LAN/WAN deployments.
Technical Specifications
- Data Rate: 1.25 Gbps (Gigabit Ethernet / 1G FC)
- Supported Variants: 1000BASE‑SX, LX/LH, ZX, BX (BiDi), and 1000BASE‑T
- Transmission Distance: 550 m MMF to 120 km SMF (depending on variant)
- Wavelength Range: 850 nm · 1310 nm · 1550 nm · 1270/1330 nm · 1490/1550 nm for BiDi
- Connector Type: LC Duplex / Simplex (BiDi) / RJ‑45 (Copper)
- Optical Component: VCSEL / FP / DFB Laser + PIN or APD Receiver
- Power Consumption: ≤ 1.0 W
- DDM/DOM: Digital Diagnostics per SFF‑8472 (optional)
- Compliance: IEEE 802.3z · 802.3ah · SFP MSA · RoHS 6 · FC‑PI
Main Features
- Hot‑pluggable 1.25 Gb/s SFP interface for fiber and copper links
- Multiple model options: SX/LX/ZX for duplex and BX for single‑fiber applications
- Low Power Design (≤ 1 W) for dense network equipment
- Supports SMF and MMF in industrial and enterprise environments
- Wide temperature range options (−40 °C to +85 °C available)
- Fully compliant with IEEE and MSA optical interoperability standards
- Supports DDM/DOM to enhance optical network monitoring and maintenance
- High stability and inter‑vendor compatibility for extensive OEM switch platforms
Applications
- Gigabit Ethernet switch uplinks and router interfaces
- FTTx access and Metro Ethernet aggregation systems
- Enterprise LAN/WAN infrastructures requiring scalable 1G links
- Storage Area Network (1G Fibre Channel) connections
- Optical media conversion systems and industrial networks
Related Keywords: 1.25G SFP, Gigabit SFP, 1000BASE SFP, BiDi SFP 1.25 Gbps, 1G Fiber Transceiver, SFP Gigabit Ethernet Module, MEFiber 1.25G SFP Optical Transceiver.
FAQ – 1.25G SFP Gigabit Transceivers
1. What does 1.25G SFP stand for?
It represents a Small Form‑Factor Pluggable transceiver operating at 1.25 Gb/s for Gigabit Ethernet or 1G Fibre Channel applications.
2. Is 1.25G SFP the same as 1000BASE SFP?
Yes. In Ethernet terms, 1.25G SFP corresponds to the 1000BASE‑X standard for Gigabit Ethernet over fiber.
3. What fiber types are supported by 1.25G SFPs?
Both multimode (MMF) and single‑mode (SMF) fibers are supported for distances from hundreds of meters up to 120 km.
4. What are the available optical wavelength options?
Typical wavelengths include 850 nm (SX), 1310 nm (LX/LH), 1550 nm (ZX), and paired 1270/1330 nm or 1490/1550 nm for BiDi types.
5. Does the 1.25G SFP family include BiDi modules?
Yes. The BiDi (1000BASE‑BX) models allow bidirectional communication over a single fiber using wavelength duplexing.
6. Can 1.25G SFP modules be used interchangeably between brands?
Yes, they follow the SFP MSA standard, ensuring multi‑vendor compatibility with Cisco, Juniper, Huawei, and others.
7. What diagnostic features do these modules support?
Models with SFF‑8472 support Digital Diagnostics Monitoring (DDM/DOM) for power, temperature, and voltage metrics.
8. Where are 1.25G SFP modules most commonly used?
They are extensively used in Metro Ethernet access, enterprise backbone, FTTx, and industrial network applications.
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