Eoptolink’s EOLQ-1640G-O-10-A3/B3/C3/D3 40G single lambda λ PAM4 CWDM QSFP+ transceiver modules are designed for 40 Gigabit Ethernet links over 10Km single mode fiber. Digital diagnostics functions are available via an I2C interface, as specified by the QSFP+MSA.