# SFP 1.25G SM 1310 20Km LC DDM Compatible with HUAWEI  Cisco etc

Features  
Dual data-rate of 1.25Gbps/1.063Gbps operation  
1310nm FP or 1490/1550nm DFB laser and PIN photo detector for 20km transmission  
Compliant with SFP MSA and SFF-8472 with simplex LC or SC receptacle  
Digital Diagnostic Monitoring: Internal Calibration or External Calibration  
Compatible with SONET OC-24-LR-1  
Compatible with ROHS  
+3.3V single power supply  
Operating case temperature: Standard: 0 to +70°C  
Applications  
Gigabit Ethernet  
Fiber Channel  
Switch to Switch interface  
Switched backplane applications  
Router/Server interface  
Other optical transmission systems  
More Module  
+  
Part Number  
Product Description  
SPT-PB531G-L10D  
1550nm Tx, 1.25Gbps, LC, 10km, 0°C ~ +70°C, With DDM  
SPT-PB531G-L20D  
1550nm Tx, 1.25Gbps, LC, 20km, 0°C ~ +70°C, With DDM  
If you need more customized services, please contact us.

## Details

- **Price:** 5.12 USD
- **Vendor:** DFT TELECOM

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 5.12 USD | In stock |

## Images

- SFP 1.25G SM 1310 20Km LC DDM Compatible with HUAWEI  Cisco etc
- SFP 1.25G SM 1310 20Km LC DDM Compatible with HUAWEI  Cisco etc
- SFP 1.25G SM 1310 20Km LC DDM Compatible with HUAWEI  Cisco etc
- SFP 1.25G SM 1310 20Km LC DDM Compatible with HUAWEI  Cisco etc
- SFP 1.25G SM 1310 20Km LC DDM Compatible with HUAWEI  Cisco etc
- SFP 1.25G SM 1310 20Km LC DDM Compatible with HUAWEI  Cisco etc
- SFP 1.25G SM 1310 20Km LC DDM Compatible with HUAWEI  Cisco etc
- SFP 1.25G SM 1310 20Km LC DDM Compatible with HUAWEI  Cisco etc
- SFP 1.25G SM 1310 20Km LC DDM Compatible with HUAWEI  Cisco etc
- SFP 1.25G SM 1310 20Km LC DDM Compatible with HUAWEI  Cisco etc

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> Source: [DFT TELECOM ](https://dfttelecom.com/products/sfp-1-25g-sm-1310-20km-lc-ddm-compatible-with-huawei-cisco-etc)
> Updated: 2026-04-20