Product Type | QSFP+ Transceiver Module |
Form Factor | Plug-in module |
Transceiver Application | 40GBASE-LR4 Ethernet |
Fiber Type | Single-mode fiber (SMF) |
Wavelengths | 4 x 1271 to 1331 nm (CWDM) multiplexed |
Max Distance Supported | 10 km |
Connector Type | LC duplex |
Hot Swappable | Yes |
Digital Optical Monitoring (DOM) | Yes |
Modulation Format | NRZ |
Power Consumption | 3.5 W (typical) |
Cisco QSFP-40G-LR4 40GBASE-LR4 OTN Transceiver, LC, 10KM

Key Benefits

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- Enables 40 Gigabit long-distance connectivity up to 10KM, ideal for campus or metro networks
- TAA compliance allows deployment in government and federal environments
- Cisco-brand assurance ensures compatibility and reduced risk in infrastructure upgrades
Product Overview
The Cisco QSFP-40G-LR4 transceiver module delivers reliable 40GBASE-LR4 Ethernet connectivity over single-mode fiber up to 10 kilometers. It uses an LC connector and is compliant with TAA standards, making it suitable for government and enterprise deployments. Manufactured with global sourcing from multiple regions, including China, Japan, and the United States, it ensures supply stability and Cisco-certified performance, ideal for data centers and long-haul networks.
Specifications
Product Overview
Physical & Environmental
Dimensions (H x W x D) | 13.9 mm x 18.35 mm x 72.4 mm |
Weight | 75 g (approx.) |
Operating Temperature Range | 0°C to 70°C (32°F to 158°F) |
Storage Temperature Range | -40°C to 85°C (-40°F to 185°F) |
Operating Humidity | 10% to 85% (non-condensing) |
Storage Humidity | 5% to 95% (non-condensing) |
Cloud Management & Licensing
Managed Through | Compatible with Cisco platforms; no direct management |
Firmware Upgradeability | Yes (via host platform) |
Licensing Requirement | None (hardware only) |
Interfaces
Interface | QSFP+ (Quad Small Form-Factor Pluggable Plus) |
Ethernet Technology | 40 Gigabit Ethernet (40GbE) |
Connector Interface | LC duplex optical |
Data Rate | 41.25 Gbps (aggregate) |
Lane Count | 4 lanes x 10.3125 Gbps |
Compliance & Origin
Country of Origin | China / Japan / Malaysia / Thailand / Taiwan / United States |
TAA Compliant | Yes |
RoHS Compliant | Yes |
EMC Standards | EN 55032, EN 55024, FCC Part 15 |
Safety Standards | UL 60950-1, IEC 60825-1, IEC 60825-2 |
Laser Class | Class 1 (21 CFR 1040.10 and 1040.11) |
Advanced Security Features
Secure Connectivity | Optical link – not directly applicable |
Authentication Support | Yes (when integrated with Cisco platforms) |
Encryption | Not supported at transceiver level |