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The Cisco 40GBASE-LR4 QSFP module supports link lengths of up to 10 kilometer over a standard pair of G.652 single-mode fiber with duplex LC connectors. The QSFP-40G-LR4-S module supports 40GBase Ethernet rate only. The 40 Gigabit Ethernet signal is carried over four wavelengths. Multiplexing and demultiplexing of the four wavelengths are managed in the device.
| Product Type | QSFP+ |
| Application/Usage | Data Networking, Optical Network |
| Interfaces/Ports Details | 1 x LC 40GBase-LR4 Network |
| Media Type Supported | Optical Fiber |
| Ethernet Technology | 40 Gigabit Ethernet |
| Network Technology | 40GBase-LR4 |
| Maximum Data Transfer Rate | 40 |
| Height | 0.5" |
| Width | 0.7" |
| Depth | 2.9" |
| Weight (Approximate) | 3.50 oz |
| Limited Warranty | 1 Year |
| Fiber Mode Supported | Single-mode |