CISCO Modules
Cisco QSFP-100G-LR4-S= 100G QSFP28 LR4 optical transceiver
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🚀 Reliable 100G Connectivity Up to 10km | Cisco QSFP-100G-LR4-S=
The Proven Long-Reach 100G Solution for Data Centers & Metro Networks
The Cisco QSFP-100G-LR4-S= is a high-performance 100G QSFP28 optical transceiver designed for long-reach transmission over single-mode fiber (SMF).
Operating around 1310nm wavelength using 4 CWDM channels, it supports transmission distances of up to 10km, making it ideal for data center interconnect (DCI) and metro network deployments.
With mature technology and strong compatibility, LR4 remains one of the most reliable and widely deployed 100G long-distance solutions.
🔥 Why This Module Is Still Essential
✔ Need stable 100G over long distance (up to 10km)
✔ Building data center interconnect (DCI)
✔ Require carrier-grade reliability
👉 LR4 = the most proven 100G long-reach solution
⚡ SR4 vs CWDM4 vs FR vs LR4
Type | Fiber | Distance | Connector | Technology |
|---|---|---|---|---|
SR4 | MMF | ≤100m | MPO | Parallel |
CWDM4 | SMF | ≤2km | LC | 4 wavelengths |
FR | SMF | ≤2km | LC | Single lambda |
LR4 | SMF | ≤10km | LC | CWDM (4 wavelengths) |
👉 LR4 = longest reach within standard 100G QSFP28
🧠 Key Features of Cisco QSFP-100G-LR4-S=
- Data Rate: 100 Gbps
- Wavelength: 1310 nm (4 CWDM lanes)
- Distance: Up to 10 km
- Connector: LC Duplex
- Fiber Type: Single-mode fiber (SMF)
- Technology: LAN-WDM (4 wavelengths)
- Form Factor: QSFP28
- Digital Optical Monitoring (DOM): Supported
- Hot-swappable
- Power Consumption: ~4–4.5W
🏗️ High-Value Application Scenarios
1. Data Center Interconnect (DCI)
- Up to 10km reach
- Inter-building connectivity
2. Metro & Carrier Networks
- Long-distance backbone links
- High reliability
3. Enterprise Campus Networks
- Building-to-building connections
- Stable long-distance transmission
4. Cloud & Hyperscale Deployment
- Reliable long-haul 100G links
- Mature ecosystem support
💡 Why Choose LR4?
👉 Alternative options:
- CWDM4 / FR → limited to 2km
- SR4 → only for short distance
👉 LR4 offers:
- Up to 10km transmission
- Proven and stable technology
- Wide compatibility across vendors
- Ideal for DCI and metro applications
✅ Best for long-distance, mission-critical networks
🧩 Complete 100G SMF Solution
✅ Optical Modules
- Cisco QSFP-100G-LR4-S=
- Cisco QSFP-100G-CWDM4-S= (for shorter 2km scenarios)
✅ Cabling
- LC-LC single-mode fiber (OS2)
✅ Equipment
- 100G switches
- DCI / metro architecture
👉 LR4 = backbone-grade 100G solution
📊 Technical Specifications
Parameter | Specification |
|---|---|
Form Factor | QSFP28 |
Data Rate | 100 Gbps |
Wavelength | 1310 nm (LAN-WDM) |
Max Distance | 10 km |
Connector | LC Duplex |
Fiber Type | Single-mode |
Power Supply | 3.3V |
Operating Temp | 0°C to +70°C |
DOM Support | Yes |
Compliance | IEEE 802.3ba, QSFP28 MSA |
❓ FAQ
Q1: What is QSFP-100G-LR4-S used for?
It is used for 100G transmission over SMF up to 10km.
Q2: Is LR4 better than CWDM4 or FR?
For long distances, yes — LR4 supports much longer reach (10km vs 2km).
Q3: What is the difference between LR4 and ER4?
LR4 supports 10km, while ER4 typically supports 40km.
Q4: What fiber is required?
Standard OS2 single-mode fiber.
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🚀 Get a Quote for Your 100G Deployment
👉 Planning a long-distance 100G network?
✔ 10km reliable transmission
✔ Carrier-grade stability
✔ Proven deployment worldwide
Contact us now for pricing and availability.