400GBASE-DR4 QSFP-DD PAM4 1310nm 500m DOM MPO-12/APC SMF SiPh-Based Optical Transceiver Module
$499400G QSFP DD DR4 optical transceiver for 500m SMF links. Supports 400GBASE-DR4, QDD 400G DR4-S, and DR4 transceiver standards for data center deployment.