[ MODEL-SPECIFIC OPTICAL NETWORK HARDWARE ]
Cisco QSFP-100G-LR4-S 100GBASE-LR4 QSFP28 Transceiver
1310nm LAN-WDM 100GbE QSFP28 optic for duplex single-mode fiber up to 10km. Confirm exact module label and host qualification before installation.
IDENTIFICATION: Match the manufacturer name, exact PID/suffix and revision to the host compatibility listing. Stated line rate and maximum reach are specifications, not measured payload performance.
Model-specific specifications
| Dedicated subcategory | SFP transceivers: optical and copper |
|---|---|
| Exact model / ordering SKU | Cisco QSFP-100G-LR4-S |
| Form factor and optical type | QSFP28 hot-pluggable four-wavelength optical module; 100GBASE-LR4. |
| Ethernet rate and interface | 100GBASE-LR4 / nominal 100Gb/s aggregate Ethernet rate using four 25Gb/s wavelengths. |
| Wavelength | Four LAN-WDM channels around 1295.56, 1300.05, 1304.58 and 1309.14nm. |
| Fiber medium and reach | G.652 single-mode fiber (SMF), up to 10km. |
| Connector | Duplex LC. |
| DOM / DDM | DOM supported; host software controls visibility of optical diagnostics. |
| Operating temperature | Commercial operating case temperature: 0°C to 70°C. |
| Host switch/router compatibility | Use Cisco TMG to verify the exact LR4-S PID, host port and software release. Confirm a duplex-SMF channel and optical budget; LR4 is not 100GBASE-SR4 and cannot use SR4’s MPO multimode plant. |
| Variant and deployment caveat | The -S suffix is part of the orderable model qualification. Check exact coding and FEC/port configuration at both ends before deployment. |
| Measured performance | No measured specimen throughput is claimed; link payload depends on both host ports, FEC, coding, protocol overhead, fiber plant and test method. |
Host qualification and installation
Use Cisco TMG to verify the exact LR4-S PID, host port and software release. Confirm a duplex-SMF channel and optical budget; LR4 is not 100GBASE-SR4 and cannot use SR4’s MPO multimode plant.
The -S suffix is part of the orderable model qualification. Check exact coding and FEC/port configuration at both ends before deployment.
Clean and inspect fiber end faces, retain dust caps during storage, follow ESD precautions, and never look into an active optical port. Record the host model, port, software release, transceiver label and available DOM values when documenting a deployed link.
Manufacturer and standards sources
- Cisco 100GBASE QSFP-100G Modules Data SheetCisco’s 100G QSFP datasheet contains LR4-S specifications; TMG is the vendor compatibility reference.
- Cisco Transceiver Module Group (TMG) compatibility matrixManufacturer lookup for transceiver PID, supported host platforms and software releases; confirm this exact labeled variant.
- IEEE 802.3 Ethernet standards familyEthernet PHY terminology and link-rate context; MSA-specific optics remain subject to their named module-family specifications.
Source links identify manufacturer documentation and qualification resources. Check the current documentation revision and exact hardware PID before deployment.