Provide a 200 GbE optical connection between QSFP-DD-equipped network interfaces over single-mode fiber. The AddOn Networks QDD-200GB-PSM8-AO implements the 200GBASE-PSM8 optical interface, operating at 1310 nm for reaches up to 2 km. Its QSFP-DD form factor supports high-density 200 GbE interface deployments where fiber uplinks or inter-device links need substantially more bandwidth than earlier Ethernet generations. PSM8 is a parallel single-mode optical transport format intended for 200 GbE links on single-mode fiber plant. The 2 km reach suits connections between network rooms, aggregation layers, data center zones, or closely located buildings where single-mode cabling is already installed. Use it in an MSA-compatible QSFP-DD host interface when the link design calls specifically for 200GBASE-PSM8 optics. Digital optical monitoring provides access to operating telemetry from the installed transceiver, helping administrators assess module status during commissioning and fault isolation. This model combines 200 GbE throughput, 1310 nm operation, single-mode fiber support, and a QSFP-DD interface in one optical module. Verify that the host interface, fiber infrastructure, and optical link design are specified for 200GBASE-PSM8 before deployment.