400G QSFP-DD Coherent DSP, DP-16QAM / DP-8QAM 80km - 120km+, Duplex LC Module, SSM, Compatible Transceiver

For our 400G QSFP-DD requirement, 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.

Performance matches the advertised specification and the price is much better than OEM optics. Support was responsive when we asked for compatibility confirmation.

For our 400G QSFP-DD requirement, the industrial temperature rating gives us more confidence for outdoor and cabinet deployments. The module stayed stable during temperature variation.

This was a direct replacement in our existing environment. No special tuning was required and the port came up at the expected speed.