The 400GBASE-FR4 module, Duplex LC connector, up to 2km over parallel single-mode fiber. It is compliant to IEEE 802.3bs, 400GBASE-FR4 Spec of 100G Lambda MSA group, and 400GAUI-8/CEI-56G-VSR-PAM4 standards.
The 400 Gigabit Ethernet signal is carried over four CWDM grid optical wavelengths. Multiplexing and demultiplexing of the four wavelengths are managed within the device.

Part Number: QDD-400G-FR4-S
Cisco QDD-400G-FR4-S Compatible 400GBASE-FR4 QSFP-DD PAM4 Optical Transceiver Module (SMF, 1310nm, 2km, LC, DOM)
Specifications
| Cisco Compatible | QDD-400G-FR4-S | Vendor Name | F-tone |
|---|---|---|---|
| Form Factor | QSFP-DD | Max Data Rate | 400Gbps |
| Wavelength | 1271nm,1291nm,1311nm,1331nm | Max. Cable Distance | 2km |
| Connector | Duplex LC/UPC | Media | SMF |
| Transmitter Type | CWDM EML | Receiver Type | PIN |
| TX Power | -3.2~4.4dBm | Minimum Receiver Power | -7.2dBm |
| Power Budget | 4dB | Receiver Overload | 4.4dBm |
| Max. Power Consumption | 9W | Extinction Ratio | 3.5dB |
| DDM/DOM | Supported | Commercial Temperature Range | 0 to 70°C (32 to 158°F) |
| Modulation (Electrical) | 8×50G-PAM4 | Modulation (Optical) | 4×100G-PAM4 |
| DSP | TX and RX | Inbuilt FEC | No |
| Core Size | G.652/9um | Packaging Technology | COB |
| Protocols | QSFP-DD MSA, CMIS.5.0, IEEE 802.3bs | Warranty | 5 Years |
This product belongs to F-tone Networks' optical components product line. For detailed specifications, please contact our sales team. Thank you!
Important Notice:
Performance figures, data and any illustrative material provided in this data sheet are typical and must be specifically confirmed in writing by F-tone Networks before they become applicable to any particular order or contract. In accordance with the F-tone Networks policy of continuous improvement specifications may change without notice.
The publication of information in this data sheet does not imply freedom from patent or other protective rights of F-tone Networks or others. Further details are available from any F-tone Networks sales representative.
