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1. Rate: 40G; Connector: Duplex lC; with DDM 2. DFB+PIN; Low Power Consumption <2.5W 3. Applied in Campus Network and Data Center 4. Fully Compatible with 100+ Vendors 5. QSFP+ MSA CompliantSee more
The Cisco QSFP-40G-LR4 compatible 40G QSFP+ transceiver module with LC duplex connectors reaches a link up to 10km over OS2 single-mode fiber (SMF). This Cisco QSFP-40G-LR4-S compatible module is verified to interoperate with original Cisco switches, including the Catalyst 3580/3560X/3650/4500/9300/9300L/9400/9500/9600/9800 and Nexus 2000/5000/6000/7000/7700/8500/9200/9300/9300X/9400X/9500/9600/9800 series, etc. This 40G optical transceiver comes with a bidirectional 4-channel QSFP+ connector, enabling a total of 40 Gbps bandwidth by each channel carrying a 10 Gbps data rate. DOM/DDM (digital diagnostics monitoring) function is supported on the QSFP 40G fiber optic transceiver to achieve real-time operating parameters monitoring.
QSFPTEK manufactured 40GBASE-LR4 QSFP+ module is compliant with QSFP+ MSA and IEEE 802.3ba 40GBASE-LR4 specifications. Besides, the QSFP LR4 optic has been tested on host devices to ensure full compatibility with Cisco equipment, such as data center switches, enterprise routers, and server network interface cards (NICs). The third-party 40G SFP module is an ideal substitute to the Cisco QSFP-40G-LR4-S QSFP+ 40G transceiver at an affordable price, providing a cost-effective compatible solution for high-performance 40G connectivity.
LR4 40G QSFP optics cater to 40 Gigabit Ethernet (40GbE) optical fiber connections, ideal for high-performance and long-distance applications in the data center, enterprise core and distribution layers, campus networks, metro networks, etc.
Every module is quality tested for compatibility in the multi-brand switches environment, which guarantees flawless operations.

Every unit sold undergoes rigorous quality testing, to ensure compatibility in the target switch environment, guaranteeing perfect operation.

Every module is qualified through rigorous procedures and advanced equipment to ensure high-quality and reliable optical devices for you.


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Compatible Cisco
Transceivers type QSFP-40G-LR4-S
The 10km link transmission is very strong. Installing the module is seamless, with rapid recognition, stable signals. The module maintains a steady temperature during operation, it's very reliable, so it's a great choice for long-distance, high-bandwidth connections in data centers.
Transceivers typeQSFP-40G-LR4-S
CompatibleCisco
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I purchased these 40GBASE-LR modules to use with my Cisco NEXUS 3064PQ. They work perfectly with my switch and I have no issues with them so far. I hope they continue to work well.
Transceivers typeQSFP-40G-LR4-S
CompatibleCisco
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I bought their optical modules once last year and had no problems with compatibility. So this time I ordered the switch again, and it is now well connected with my equipment, the signal is more stable and the transmission rate is fast.
Transceivers typeQSFP-40G-LR4-S
CompatibleCisco
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Realistically speaking, I can’t find any defects about QSFP-40G-LR4, I don't even know why they can provide so cost-effective compatibility at such a bottom price, maybe expand the market to catch large buyers, who knows, really friendly to me. So far works well, I like it.
Transceivers typeQSFP-40G-LR4-S
CompatibleCisco
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This module functions on N9K-X9732C-EX with reliable performance. The item is delivered from the US, very quick shipment.
Transceivers typeQSFP-40G-LR4-S
CompatibleCisco
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