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This picture is about AG.
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This picture is about ER4-1.
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This picture is about ER4-2.
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Product Highlights

Max. Power Consumption 1.2W
Tested in Targeted Switches for Superior Performance, Quality, and Reliability
High-Speed Electrical Interface Compliant to IEEE 802.3ba
Support 40G to 4x10G Breakout Application
FS BOX - Support Real-time Configuration
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Transceiver Compatibility Verification
Use the Compatibility Tool to verify FS transceiver compatibility with your device and access test reports.

Avago QSFP-40G-ER4 Compatible 40GBASE-QSFP-ER4 QSFP+ Optical Transceiver Module (SMF, 1310nm, 40km, LC, DOM)

The QSFP+ module is designed for use in 40GBASE Ethernet throughput up to 40km over single mode fiber (SMF) using a wavelength of 1310nm via duplex LC connectors. This transceiver is compliant with QSFP+ MSA, IEEE 802.3bm 40GBASE-ER4 and OTU3 standard. Digital diagnostics functions are also available via the I2C interface, as specified by the QSFP+ MSA, to allow access to real-time operating parameters. With these features, this easy to install, hot swappable transceiver is suitable to be used in various applications, such as data centers, high-performance computing networks, enterprise core and distribution layer applications.

Certifications
Fully certified to meet strict international safety and quality standards for the industry. Go to the Compliance Center for specific certifications.
Please Note: Installing a third party transceiver does not void your network equipment warranty. Network equipment manufacturers all have guidelines stating that warranty support on their products will not be affected.