40G QSFP-ER4 40 KM transceiver modules are designed for use in 40 Gigabit Ethernet links over single mode fiber. They are compliant with the QSFP+ MSA and IEEE 802.3bm 40GBASE-ER4. Digital diagnostics functions are available via an I2C interface, as specified by the QSFP+ MSA.
The optical transceiver is compliant per the RoHS Directive 2011/65/EU.

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