MikroTik HS-31DLC20D SFP optical module SM 20km 1 25G 1330Nm DDM

MikroTik HS-31DLC20D — SFP Optical Module for Networks

For users who need high-speed and reliable optical connectivity, the MikroTik HS-31DLC20D optical module is the ideal solution. This SFP module supports data rates up to 2.5G, allowing for increased transmission capacity without replacing the existing optical infrastructure. With a 20 km range over single-mode fiber, it is suitable for backbone connections, campus networks, or Internet Service Provider (ISP) infrastructure. The module also uses 1310 nm wavelength and LC duplex connector, ensuring full duplex operation. With built-in digital diagnostics (DDM), you have full control over the operating parameters and status of your network.

Support for high speeds and long range

MikroTik HS-31DLC20D supports 1G and 2.5G data transmission over 9/125 µm single-mode optical fiber, providing flexibility for a wide range of deployments. The range of up to 20 km eliminates the need for amplifiers or repeaters on long routes, which reduces operating costs and increases efficiency. This is crucial for backbone connections and large-scale networks.

Built-in Digital Diagnostics (DDM)

The module is equipped with the Digital Diagnostics (DDM) function, which allows you to monitor the output optical power, voltage, temperature and laser current. This allows you to detect deviations from the normal state in a timely manner, set operating limits and plan maintenance. This function ensures long-term stability and higher reliability of the network infrastructure.

Signal Loss Indication and Output Characteristics

MikroTik HS-31DLC20D has the Loss of Signal (LOS) function with an open collector output. In standard operation it signals a logic 0, while in case of signal loss it switches to a logic 1. The output must be connected via a pull-up resistor (4.7 kΩ - 10 kΩ) on the host device side. This allows for quick detection of outages and faster response to network problems.

Technical data

• Format: SFP
• Connector: LC duplex
• Fiber mode: single-mode
• Data rate: 1G / 2.5G
• Wavelength: 1,310 nm
• Range: up to 20 km
• Output optical power: -5 to 0 dBm
• Receiver sensitivity (OMA): -20 dBm
• LOS-Deasserted (average): -21 dBm
• LOS-Asserted (average): -35 dBm
• LOS-Hysteresis: 0.5-5 dB
• Receiver differential output voltage: 300-600 mVpp
• Digital diagnostics: DDM (yes)

The MikroTik HS-31DLC20D provides performance, flexibility and reliability you need for modern optical networks. This module is ideal for industrial deployments where high stability and easy maintenance are key.