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MikroTik XS+31LC20D - SFP28 25G 20km Single Mode
The Mikrotik XS+31LC20D is a single-mode fiber optic adapter supporting SFP, SFP+, and SFP28 ports. It provides data transmission speeds of 1, 10, and 25 Gbps over distances of up to 20 km. The transceiver features a Dual LC UPC connector and operates at a wavelength of 1310 nm.
MikroTik XS+31LC20D – 25G SFP28 Optical Transceiver Module (Single Mode, 20 km)
MikroTik XS+31LC20D is an optical transceiver module supporting SFP, SFP+, and SFP28 form factors. The module enables network connections at data transmission rates of 1 Gbps, 10 Gbps, and 25 Gbps. This model is a direct upgrade to the XS+31LC10D, offering double the operating range (up to 20 kilometers). This specification provides high flexibility for building long-distance fiber optic links without requiring costly upgrades to existing network infrastructure.
The transceiver works with single-mode fiber (Single Mode) and is equipped with a Dual LC UPC connector. Both signal transmission and reception operate at a 1310 nm wavelength. Transmitter output power (Tx) ranges from -3 to 2 dBm, with a receiver sensitivity (Rx OMA) of -14 dBm. The receiver features a differential output voltage between 340 and 800 mVpp. The unit signals Loss of Signal (LOS) via LVTTL logic levels.
Key Features
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Supported Form Factors: Compatibility with SFP, SFP+, and SFP28 slots.
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Transmission Speeds: Compatible with 1G, 10G, and 25G throughput.
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Supported Media: Single-mode fiber (Single Mode).
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Connector Type: Dual LC UPC.
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Maximum Range: Up to 20 km.
Technical Specifications
| Form Factor | SFP / SFP+ / SFP28 |
| Connector | Dual LC UPC |
| Fiber Operating Mode | Single Mode |
| Supported Data Rate | 1G / 10G / 25G |
| Wavelength | 1310 nm |
| Max. Transmission Distance | 20 km |
| Maximum Power Consumption | 1 W |
| Operating Temperature | -40°C to +70°C |
Optical Characteristics |
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| Transmitter Output Power | -3 to 2 dBm (launched into SMF) |
| Receiver Sensitivity (OMA) | -14 dBm (measured with PRBS 2^31-1 test pattern, 25.78G@BER=5E-5) |
| LOS-Deasserted (Avg.) | -15 dBm |
| LOS-Asserted (Avg.) | -30 dBm |
| LOS Hysteresis | 0.5 to 5 dB |
Electrical Characteristics |
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| Receiver Differential Output Voltage | 340 to 800 mVpp (with 100Ω differential termination) |
| LOS Output Voltage – High (Voltage-High) | 2.0 to Vcc V (LVTTL logic level: state 1 indicates loss of signal) |
| LOS Output Voltage – Low (Voltage-Low) | Up to 0.8 V (LVTTL logic level: state 0 indicates normal operation) |
| Manufacturer SKU | XS+31LC20D |
|---|---|
| Manufacturer | Mikrotik |
| GPSR contact | Mikrotikls SIA Unijas iela 2, LV-1039 Riga, Latvia support@mikrotik.com |
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