



200G QSFP56 FR4 transceiver—4×50G PAM4 CWDM4 @ ~1310 nm over LC duplex, up to 2 km on OS2; 200GAUI-4 electrical, CMIS management, low power for data-center and metro access.
The 200G QSFP56 FR4 is a 200-Gigabit Ethernet single-mode transceiver for up to 2 km links. It uses 4×50G PAM4 lanes over CWDM4 wavelengths around 1310 nm on a duplex LC interface, with a 200GAUI-4 electrical host—ideal for spine/leaf fabrics, data-center interconnect within campus, and metro access uplinks.
Standards & Management
Optical: 200GBASE-FR4 (IEEE 802.3cu)
Electrical: 200GAUI-4 (4×53.125 Gbps PAM4) with host KP4 FEC
Module management: CMIS 4.0+ (DOM/diagnostics, alarms)
Optics & Reach
Wavelengths: CWDM4 grid ~1295.56 / 1300.05 / 1304.58 / 1309.14 nm
Connector/Fiber: LC duplex, OS2 SMF
Reach: up to 2 km (typical)
Performance & Power
Line rate: 200 GbE (4×50G PAM4)
Typical power: ≤ 6 W (platform-dependent)
PRBS/loopback support; low BER with host KP4 FEC
Reliability & Environment
Case temp: 0 to +70 °C (commercial); extended temp on request
Laser safety: Class 1 (IEC 60825-1)
RoHS/REACH compliant
Use Cases
200G spine–leaf connectivity inside and across halls/campuses
2 km SMF DCI within campus/metro access
Aggregation uplinks where duplex-LC and WDM optics simplify cabling