QSFP-400G-ER8-MSA-AT Universally Coded MSA Compliant Transceiver QSFP-DD 400GBase-ER8 PAM4 (1310nm, SMF, 40km, LC, DOM)QSFP 400G ER8 MSA AT Universally Coded MSA Compliant Transceiver QSFP DD 400GBase ER8 PAM4 (1310nm, SMF, 40km, LC, DOM) ATGBICS Universally Coded MSA Compliant QSFP 400G ER8 MSA AT QSFP DD 400GBase LR4 form factor network transceiver supports a distance of up to 40km 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) support