Cisco QSFP-100G-CWDM4-S — 100G CWDM4 QSFP28 Optical Transceiver
Save significantly over new pricing on this fully tested Cisco QSFP-100G-CWDM4-S 100GBASE-CWDM4 transceiver module, backed by Reef Telecom's industry-leading 10-year warranty. Delivers reliable 100 Gigabit Ethernet connectivity up to 2km over single-mode fiber with duplex LC connectors — ideal for data center interconnects, high-performance computing, and enterprise core networks.
Technical Specifications
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Part Number: QSFP-100G-CWDM4-S
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Form Factor: QSFP28 (hot-swappable plug-in module)
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Data Rate: 100Gbps (4 x 25Gbps NRZ channels)
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Wavelengths: 1271, 1291, 1311, 1331nm (CWDM4)
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Max Distance: 2km over G.652 single-mode fiber (SMF)
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Connector: Duplex LC/UPC
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Digital Diagnostics: DOM/DDM via I2C interface
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Power Consumption: ≤3.5W
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Operating Temp: 0°C to 70°C
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Standards: IEEE 802.3bm, 100G CWDM4 MSA, SFF-8636, SFF-8661
Key Advantages
- Duplex LC connectors simplify cabling vs. MPO-based parallel optics
- Four multiplexed wavelengths reduce fiber requirements by 75%
- Lower cost alternative to 100G-LR4 for distances under 2km
- Hot-swappable design enables zero-downtime maintenance
- CWDM4 MSA compliant for broad interoperability
Why Buy from Reef Telecom?
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10-Year Warranty — the longest in the refurbished telecom industry
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Free Shipping on orders over $300
- Every unit fully tested and inspected before shipment
- Bulk pricing available for large-scale deployments
Compatibility & Use Cases
The QSFP-100G-CWDM4-S is compatible with Cisco Nexus 9000, Catalyst 9500, NCS 5500, and other Cisco platforms with QSFP28 ports. Interoperable with the Cisco QSFP-100G-SM-SR module. Ideal for data center spine-leaf fabrics, campus backbone links, inter-building interconnects, and high-performance computing clusters.
