Cisco QDD-400G-ZRP-S Compatible 400G QSFP-DD Transceiver Module
Built for hosts recognizing QDD-400G-ZRP-S, this HT-manufactured QSFP-DD module delivers 400G transmission at 1528.77nm-1567.13nm. Its rated reach is ＞600km, with Duplex LC/UPC as the physical interface. The specifications and engineering guidance below support project teams keep OEM references, delivery records and port schedules aligned, while keeping HT manufacture separate from the OEM cross-reference.
OEM Part Number: QDD-400G-ZRP-SHT Part Number: QDD-ZRP-400G
Product Highlights
- Compatible alternative to Cisco QDD-400G-ZRP-S
- 400G connectivity at 100/200/300/400 Gbps
- Optical wavelength: 1528.77nm-1567.13nm
- Specified reach: ＞600km
- Duplex LC/UPC / SMF interface
- Digital diagnostic monitoring: Supported
- Operating temperature: 0~70℃
Specifications
| Cisco Compatible | QDD-400G-ZRP-S |
|---|---|
| Manufacturer | HT |
| HT Part Number | QDD-ZRP-400G |
| Form Factor | QSFP-DD |
| Max. Data Rate | 100/200/300/400 Gbps |
| Wavelength | 1528.77nm-1567.13nm |
| Max. Cable Distance | ＞600km |
| Connector | Duplex LC/UPC |
| Media | SMF |
| CD Tolerance | ZR400-OFEC-16QAM: 12.0ns/nmZR300-OFEC-8QAM: 18.0ns/nmZR200-OFEC-QPSK: 24.0ns/nmZR100-OFEC-QPSK: 48.0ns/nm |
| DDM/DOM | Supported |
| TX Power | -13~-7dBm |
| RX Power | Amplified: Full Rx OSNR tolerance: -12~0dBm Extended range: ZRx00-OFEC: -18~3dBm 400ZR: -15~1dBm Unamplified: 400ZR: -20~0dBm ZR400-OFEC-16QAM: -23~0dBm ZR300-OFEC-8QAM: -26~0dBm ZR200-OFEC-QPSK: -30~0dBm ZR100-OFEC-QPSK: -32~0dBm |
| Max. Power Consumption | 22.5W |
| Commercial Temperature Range | 0~70℃ |
| OSNR Tolerance | 400G ZR: 26dB/0.1nm400G ZR+: 23.5dB/0.1nm300G ZR+: 20dB/0.1nm200G ZR+: 15dB/0.1nm100G ZR+: 12dB/0.1nm |
| Inbuilt FEC | OFEC, CFEC |
| Modulation Format | 100G DP-QPSK,200G DP-QPSK,300G DP-8QAM,400G DP-16QAM |
| Protocols | Open ZR+ MSA 2.0 and OIF-400ZR-02.0, OIF-CMIS-05.2, OIF-C-CMIS-01.2, QSFP-DD-Hardware-Rev6.3, IEEE Std 802.3-2018 |
Project Documentation and Traceability
Large deployments are easier to audit when the order code, optical standard and endpoint record agree. Keep the OEM reference in the compatibility document and the HT part number on the packing list. Labels and carton groups can be arranged by rack or port plan so installers need not identify modules by appearance. For this model, the principal parameters are data rate 100/200/300/400 Gbps, wavelength 1528.77nm-1567.13nm, rated reach ＞600km.
Cisco Compatibility and Factory Testing
The module is checked for host recognition as QDD-400G-ZRP-S, link establishment and diagnostic reporting. Physical cage fit alone is not treated as evidence of compatibility. Equipment model, hardware revision and software release can be reviewed before dispatch where platform behavior is uncertain.
Applications and Optical Link Design
This coherent interface is suited to data-center interconnect, metro transport and managed DWDM links where the host platform supports the stated modulation and FEC modes. Design the optical line around the actual launch power, receiver range, OSNR requirement and span loss; the stated reach is not a substitute for a link-budget calculation. Use matching coherent modules and the appropriate DWDM channel plan at both ends.
Before deployment, check the host port type, supported data rate and firmware requirements. The 400G interface configuration must match the remote equipment; sharing a QSFP-DD housing alone does not make two transceiver types interoperable.
Coherent deployment requires a line-system review, not merely a matching connector. Confirm the DWDM channel, launch-power range, receiver limits, OSNR and FEC mode at both ends. Span loss and amplifier operation must remain inside the supported envelope, and stated reach should be validated against the actual route.
Optical Acceptance, Diagnostics and Handling
For this model, the specified transmit-power range is -13~-7dBm. During commissioning, record the host diagnostic readings after the link has stabilized and compare them with those limits. DOM values are useful operational indicators, but they do not replace calibrated optical measurements when a link is marginal. Investigate unexpected loss through connector inspection, cleaning and a channel measurement before replacing the module. Diagnostic monitoring is listed as Supported. Before every insertion, keep dust caps in place until the patch lead is ready, avoid touching the optical end face and use an appropriate inspection and cleaning procedure. Do not look into an active optical interface.
Frequently Asked Questions
Is this an original Cisco transceiver?
No. It is an HT-manufactured compatible alternative for equipment that specifies QDD-400G-ZRP-S, not an original Cisco-branded module.
Which fiber and connector are required?
Use Duplex LC/UPC with SMF. The specified maximum reach is ＞600km, subject to fiber quality and total link loss.
Can it be mixed with another wavelength or reach version?
Only when the two ends share the same optical standard, wavelength plan and supported data rate. Check the exact part numbers and link budget rather than relying only on the module form factor.
Ordering Information
Quote HT part number QDD-ZRP-400G together with OEM reference QDD-400G-ZRP-S and quantity. Add the host model and software release when pre-order verification is required. Neutral labels, customer packaging and project-specific compatibility review are available on request.
Shipping and Lead Time
Standard configurations normally ship within one to three working days, with production lead times confirmed for larger quantities. International courier, air freight and sea freight are available; customer courier accounts and nominated forwarders are accepted.
Quality Assurance and Packaging
Quality control covers the optical or electrical interface, host identification and operating link. The verified unit is then individually protected and cartoned. Customer references, rack groups and project packing lists can be added for volume orders.
