QDD-400G-FR4-S Cisco Compatible 400GBASE-FR4 QSFP-DD Transceiver
Cisco compatible QDD-400G-FR4-S - Key Features
- Compatibility: Cisco
- Media Type: Single-Mode Fiber (SMF)
- Connector: Double LC/UPC
- Fiber Count: Duplex
- Maximum Distance: 2 km
- Guaranteed Link Budget: 4 dB
- Tx Wavelenght: CWDM 4 Ch
- Supported Data Rate: 425 Gbps
- DDM/DOM: Supported
- Forward Error Correction (FEC): Host FEC Supported
- Temperature Range: Standard 0°-70°C
Cisco QDD-400G-FR4-S Price
SKU:400G-QSFP-DD-2.1-CI
Made to Order - 2 WeeksCisco compatible QDD-400G-FR4-S Specifications
Form Factor | QSFP-DD |
Modulation | PAM4 (Pulse Amplitude Modulation 4-level) |
Media Type | Single-Mode Fiber (SMF) |
Connector | Double LC/UPC |
Fiber Count | Duplex |
Maximum Distance | 2 km |
Guaranteed Link Budget | 4 dB |
TX Wavelenght | 4-channel CWDM (1271/1291/1311/1331 nm) |
RX Wavelenght | 4-channel CWDM (1271/1291/1311/1331 nm) |
Supported Data Rate | 425 Gbps |
Supportet Ethernet Applications | 400G Ethernet (425 Gbps) |
DDM/DOM | Supported |
Forward Error Correction (FEC) | Host FEC Supported |
CDR (Clock and Data Recovery) chip | Supported |
Transmitter Type | EML Laser |
Tx Wave Bandwidth | 73 nm (1264.50–1337.50 nm) |
Average Launch Power (Min) Each Lane | -3.3 dBm |
Average Launch Power (Max) Each Lane | 3.5 dBm |
Extinction Ratio (Min) | 3.5 dB |
Receiver Type | PIN photodiode |
RX Wave Bandwidth | 73 nm (1264.50–1337.50 nm) |
Average Receiver Sensitivity (Min) Each Lane | -7.3 dBm |
Average Receiver Sensitivity (Max) Each Lane | 3.5 dBm |
Receiver Overload | 4.5 dBm |
Temperature Range | Standard 0°-70°C |
Storage Temperature | -40° to 85°C |
Relative Humidity | 5 to 85% |
Power Consumption (Max) | 10 W |
Power | +3.3V single power supply |
Compliance | CE, RoHS, Class 1 FDA and IEC60825-1 Laser Safety Compliant, 100G Lambda MSA, 400GBASE-FR4, IEEE 802.3cu, QSFP-DD MSA |
Cisco compatible QDD-400G-FR4-S Datasheet
v2Complete technical specifications and product details
Cisco compatible QDD-400G-FR4-S Description
The EDGE 400G-QSFP-DD-2.1 is a direct replacement for the Cisco QDD-400G-FR4-S, coded with Cisco-recognized EEPROM data. NX-OS and IOS-XR accept it without workaround commands. Same duplex LC connector, same 2km single-mode reach, same 400GBASE-FR4 optical specs.
The module transmits on four CWDM wavelengths (1271, 1291, 1311, 1331nm) using PAM4 modulation at 50GBaud per lane for a 400 Gb/s aggregate data rate. An internal DSP performs gearbox adaptation between the electrical host interface and the four optical lanes. Rated for a 4dB maximum optical link budget, supporting 2km over OS2 single-mode fiber. Operating temperature 0 to 70°C.
QDD-400G-FR4-S is used on Cisco platforms with QSFP-DD ports: Nexus 9300-GX2 and 9500-EX/FX3 series, Catalyst 9500X, and Cisco 8000 series routers. No "service unsupported-transceiver" command or CLI override is required for this module.
The "-S" in QDD-400G-FR4-S designates the standard (commercial) temperature variant at 0 to 70°C. Cisco also lists a breakout variant (QDD-4X100G-FR-S) under a separate SKU with different optical and connector specifications. If your purchase order references QDD-400G-FR4-S, this is the correct EDGE replacement.
The module conforms to IEEE 802.3cu for the 400GBASE-FR4 optical interface and the 100G Lambda MSA. DDM/DOM via CMIS provides real-time per-channel transmit and receive power, temperature, voltage, and bias current through your NMS or CLI.
Need to verify compatibility with a specific Cisco line card or looking for volume pricing? Contact our sales team.
Frequently Asked Questions
Which Cisco platforms support the QDD-400G-FR4-S?
QDD-400G-FR4-S is used on Cisco platforms with QSFP-DD ports, including the Nexus 9300-GX2 and 9500-EX/FX3 series, Catalyst 9500X, and Cisco 8000 series routers. No "service unsupported-transceiver" command or CLI override is required. The EDGE module is coded with Cisco-recognized EEPROM data, so NX-OS and IOS-XR accept it without workaround commands. Check the Cisco Hardware Compatibility List for your specific line card and software release.
What does the "-S" suffix mean on QDD-400G-FR4-S?
The "-S" designates the standard (commercial) temperature variant, rated 0 to 70°C. This is the version used in data center and enterprise deployments with controlled ambient temperatures. Cisco also offers extended-temperature variants for outdoor or uncontrolled environments under different part numbers.