QSFP-DD-400G-LR4-20-MSA Universally Coded MSA Compliant Transceiver QSFP-DD 400GBase-LR4 PAM4 (1310nm, SMF, 20km, LC, DOM)QSFP DD 400G LR4 20 MSA Universally Coded MSA Compliant Transceiver QSFP DD 400GBase LR4 PAM4 (1310nm, SMF, 20km, LC, DOM) ATGBICS Universally Coded MSA compliant QSFP DD 400G LR4 20 MSA QSFP DD 400GBase LR4 form factor network transceiver supports a distance of up to 20km over single mode fibre (SMF) using a wavelength of 1310nm via an LC Duplex connector. This product operates within a commercial temperature range. Digital optical monitoring (DOM)