400G QSFP-DD Coherent DSP, DP-16QAM Up to 80km, Duplex LC Module, SSM, Compatible Transceiver

For our 400G QSFP-DD requirement, performance matches the advertised specification and the price is much better than OEM optics. Support was responsive when we asked for compatibility confirmation.

We deployed this module in a live network and the link has remained stable under continuous traffic. The diagnostics are clear and the optical power margin is exactly where we expected it to be.

For our 400G QSFP-DD requirement, the order arrived quickly, well packed, and ready for installation. We had no damaged units and the rollout schedule was not delayed.

The module delivered strong optical margin on a long single-mode route. It helped us avoid an intermediate active relay site.

We used this for a metro interconnect and saw clean DOM readings after turn-up. The link has been stable during peak traffic.