Network transceiver module MikroTik S-85DLC05D

S-85DLC05D is a 1.25G SFP transceiver operating at 850 nm with dual LC connectors for multimode fiber links up to 550 meters. The module includes DDM (Digital Diagnostics Monitoring) and is designed for use in network devices that accept SFP form-factor transceivers.

Advantages

The MikroTik S-85DLC05D provides a standard 1.25G interface with an 850 nm wavelength and dual LC connectors, enabling straightforward multimode fiber connectivity. It supports DDM for status and diagnostic reporting and has been tested for compatibility with multiple MikroTik router and switch models. The module can also interoperate with non-MikroTik SFP ports that follow standard SFP specifications.

Suitable for

• Short-range multimode fiber links (up to 550 m)
• Upgrading or replacing SFP ports in MikroTik RB260GS, RB2011 series and CCR1036 devices
• Interoperable SFP connections in compliant third-party equipment

Key specifications

• Data rate: 1.25 Gbit/s
• Wavelength: 850 nm
• Connector type: Dual LC
• Maximum multimode reach: up to 550 m
• Feature: DDM (Digital Diagnostics Monitoring)

How to use

Insert the S-85DLC05D SFP transceiver into a compatible SFP port on the network device until it seats firmly. Connect LC-terminated multimode fiber patch cords to the transceiver’s dual LC ports, ensuring correct transmit/receive alignment. After physical installation, verify link status and diagnostics via the device management interface; enable or read DDM values if supported by the host device.

Recommendations

Use multimode fiber and LC patch cords rated for 850 nm transmission. For reliable performance, verify compatibility with your device firmware and confirm DDM support in the host system. Avoid exposing the transceiver to electrostatic discharge and connect/disconnect fiber with care to prevent end-face contamination.