400G QSFP-DD CWDM Silicon Photonics, duplex LC Up to 2km, Duplex LC Module, SSM, Compatible Transceiver

For our 400G QSFP-DD requirement, we ran an extended burn-in test before deployment. The temperature, Tx power, and Rx power stayed stable throughout the test window.

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

The industrial temperature rating gives us more confidence for outdoor and cabinet deployments. The module stayed stable during temperature variation.

We added these to our spare parts pool because the compatibility and delivery lead time are predictable. Good option for planned expansion and emergency replacement.

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