Product Overview
The TS-QD-314H-40C 400G QSFP-DD ER4 optical transceiver is a high-performance, hot-pluggable 400G module engineered for modern cloud computing, AI networking, telecom backbone, and hyperscale data center applications. Operating at 1310nm over single-mode fiber (SMF), this 400G QSFP-DD ER4 module supports transmission distances up to 40km while delivering stable, low-latency, and energy-efficient connectivity.
Built with advanced PAM4 modulation technology and compliant with QSFP-DD MSA and IEEE 802.3bs standards, the module enables ultra-high-bandwidth data transmission for next-generation Ethernet infrastructure. The integrated DDM/DOM digital diagnostics monitoring function allows real-time monitoring of optical performance parameters including temperature, voltage, TX bias, TX power, and RX power for simplified maintenance and improved network reliability.
Designed for compatibility with mainstream switches, routers, and transport platforms, the TS-QD-314H-40C offers reliable interoperability and flexible deployment across enterprise networks, telecom systems, and high-density spine-leaf architectures.
Figure 1 shows the front panel of 400G QSFP-DD 1310nm ER4.
Key Features
- Supports 400Gbps Ethernet transmission
- QSFP-DD hot-pluggable form factor
- 1310nm CWDM4 wavelength technology
- Up to 40km transmission over SMF
- LC duplex optical interface
- PAM4 modulation technology
- Built-in DDM/DOM digital diagnostics
- Low power consumption design
- Compliant with IEEE 802.3bs and QSFP-DD MSA
- Suitable for AI clusters, cloud computing, and telecom backbone networks
Quick Specifications
| Parameter |
Specification |
| Product Model |
TS-QD-314H-40C |
| Form Factor |
QSFP-DD |
| Data Rate |
400Gbps |
| Wavelength |
1310nm |
| Transmission Distance |
40km |
| Fiber Type |
Single-Mode Fiber (SMF) |
| Connector |
Duplex LC |
| Modulation |
PAM4 |
| Monitoring |
DDM / DOM |
| Operating Temperature |
0°C ~ 70°C |
| Power Supply |
3.3V |
| Application |
Data Center / Cloud / Telecom |
Detailed Specifications
| Category |
Description |
| Optical Interface |
4×100G PAM4 LAN-WDM |
| Standard Compliance |
IEEE 802.3bs, QSFP-DD MSA |
| Maximum Reach |
40km over G.652 SMF |
| Optical Connector |
Duplex LC |
| TX Wavelength |
1310nm |
| Receiver Sensitivity |
≤ -15 dBm |
| Power Consumption |
Low Power Design |
| Digital Diagnostics |
Real-Time DDM Monitoring |
| Hot Swappable |
Yes |
| Compatibility |
Cisco, Huawei, Juniper, Arista, Nokia, HPE Compatible |
| Applications |
400G Ethernet, DCI, Telecom Backbone |
Applications
AI and HPC Networks
Supports ultra-high-bandwidth communication between GPU clusters and AI computing nodes.
Cloud Data Centers
Optimized for spine-leaf architecture and hyperscale interconnect deployments.
Telecom Backbone
Provides stable long-distance 400G optical transmission for metro and backbone networks.
Data Center Interconnect (DCI)
Ideal for connecting geographically separated data centers up to 40km apart.
Why Choose QSFP-DD ER4 Instead of FR4 or DR4?
| Module Type |
Distance |
Fiber Type |
Connector |
Typical Use |
| DR4 |
500m |
SMF MPO |
MPO-12 |
Short-reach data center |
| FR4 |
2km |
SMF |
LC Duplex |
Campus and medium-range |
| LR4 |
10km |
SMF |
LC Duplex |
Enterprise backbone |
| ER4 |
40km |
SMF |
LC Duplex |
Long-distance DCI & Telecom |
The TS-QD-314H-40C 400G QSFP-DD ER4 module is the ideal solution for users requiring stable long-distance transmission without deploying coherent optics technology. Compared with DR4 and FR4 modules, ER4 offers significantly longer reach and greater deployment flexibility.
Advantages of QSFP-DD Packaging
QSFP-DD has become one of the mainstream packaging formats for 400G optical networking because it offers:
- Higher port density
- Backward compatibility with QSFP28
- Lower power consumption compared with larger OSFP modules
- Better scalability for future network upgrades
Industry discussions highlight QSFP-DD as a preferred option for high-density data center deployments and future 400G infrastructure expansion.
FAQ
Q1: What is the maximum transmission distance of the TS-QD-314H-40C?
The module supports transmission distances up to 40km over standard single-mode fiber (SMF).
Q2: Does this 400G QSFP-DD ER4 support DDM monitoring?
Yes. It supports full DDM/DOM digital diagnostics monitoring including temperature, voltage, TX/RX optical power, and bias current.
Q3: Is this module compatible with Cisco or Huawei switches?
Yes. The module supports compatibility coding for major brands including Cisco, Huawei, Juniper, Arista, Nokia, and HPE platforms.
Q4: What connector type does this module use?
It uses a duplex LC optical connector for single-mode fiber transmission.
Q5: What modulation technology is used?
The module uses advanced PAM4 modulation technology for efficient 400G transmission.
Q6: What is the difference between QSFP-DD ER4 and FR4 modules?
ER4 modules support up to 40km transmission, while FR4 modules typically support up to 2km. ER4 is more suitable for telecom backbone and long-distance DCI applications.
Q7: Can this module be used in AI infrastructure?
Yes. The TS-QD-314H-40C is ideal for AI clusters, GPU networking, and hyperscale cloud environments requiring high-speed low-latency connectivity.
After-Sales Service
We provide professional technical support and reliable after-sales services for all optical transceiver products:
- 100% compatibility testing before shipment
- Fast worldwide shipping
- Technical support from experienced engineers
- 1-year warranty service
- DOA replacement support
- Bulk order discounts available
- OEM and customized label support
Why Buy From Us?
- Large inventory ready to ship
- Competitive factory-direct pricing
- Strict quality control procedures
- Global delivery support
- Multi-brand compatibility solutions
- Professional support for enterprise and telecom projects
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