QSFP28 Optical Transceiver Module for Networking Equipment MikroTik XQ+31LC02D

MikroTik XQ+31LC02D is a QSFP28 100G optical module for single-mode fiber, designed for high-speed connections at distances up to 2 km in data center infrastructures, spine fabrics, and 100G device interconnects. It is deployed in MikroTik switches and routers with QSFP28 ports — including CCR2216 and CRS504 — for 100G uplinks within data centers, inter-rack connections, and inter-building links over existing single-mode fiber. It is the essential optical component for deployments requiring 100 Gbps aggregate bandwidth with high reliability in demanding environmental conditions.

The module uses LR4 technology with four independent full-duplex channels of 25 Gbps each at wavelengths 1271nm, 1291nm, 1311nm, and 1331nm, delivering 100 Gbps aggregate bandwidth on a dual LC UPC connector. The multi-channel architecture provides redundancy at the optical channel level and consistent performance across the full 2 km distance on single-mode fiber. Built-in digital diagnostic functions — including TX/RX optical power monitoring, temperature, voltage, and bias current — provide complete link health visibility for proactive monitoring and rapid troubleshooting in active production environments.

The module is designed for reliable operation in extreme conditions: temperatures up to 70°C, high humidity, and EMI interference — parameters critical for installations in high-density server rooms with significant thermal variations. An MTBF of approximately 200,000 hours at 25°C confirms durability for continuous 24/7 operation in critical infrastructures. The standard QSFP28 form factor ensures compatibility with QSFP28 ports in the MikroTik ecosystem and equipment from other manufacturers conforming to the standard.

Recommended for inter-rack and intra-data-center 100G connections over single-mode fiber in infrastructures with CCR2216, CRS504, and other MikroTik equipment with QSFP28 ports, compact spine fabrics requiring 100G uplinks at distances up to 2 km, and any deployment where reliability under demanding thermal and EMI conditions is an operational requirement. Also suited for inter-building connections over existing single-mode fiber where the 2 km distance covers most enterprise campuses and small to medium data centers.