CISCO Modules

Cisco QSFP-100G-FR-S= 100G QSFP28 FR optical transceiver

Cisco QSFP-100G-FR-S, QSFP-100G-FR-S=, 100GBASE-FR QSFP28, single lambda 100G module, PAM4 100G transceiver, 100G 2km optical module, CWDM4 alternative

🚀 Simplified 100G Over Single Wavelength | Cisco QSFP-100G-FR-S=

The Next Evolution of Cost-Optimized 100G SMF Connectivity

The Cisco QSFP-100G-FR-S= is a high-performance 100G QSFP28 optical transceiver designed for medium-reach transmission over single-mode fiber (SMF).

Using single-lambda PAM4 technology at 1310nm, it enables 100G transmission over just one wavelength, significantly simplifying optical architecture compared to traditional CWDM4 solutions.

With a reach of up to 2km over duplex SMF, it is ideal for modern data centers seeking lower cost, lower power, and simplified deployment.

🔥 Why This Module Is Trending

✔ Want to reduce cost vs CWDM4/LR4 ✔ Looking for simpler optical architecture ✔ Moving toward next-gen 100G single lambda solutions

👉 FR = simpler, cheaper, next-generation 100G standard

⚡ SR4 vs CWDM4 vs FR vs DR

Type	Fiber	Distance	Connector	Technology
SR4	MMF	≤100m	MPO	Parallel
CWDM4	SMF	≤2km	LC	4 wavelengths
FR	SMF	≤2km	LC	Single lambda (PAM4)
DR	SMF	500m	LC	PAM4

👉 FR = same reach as CWDM4, but simpler + lower cost

🧠 Key Features of Cisco QSFP-100G-FR-S=

Data Rate: 100 Gbps

Wavelength: 1310 nm (single lambda)

Distance: Up to 2 km

Connector: LC Duplex

Fiber Type: Single-mode fiber (SMF)

Technology: PAM4 modulation

Form Factor: QSFP28

Digital Optical Monitoring (DOM): Supported

Hot-swappable

Lower power consumption (~4W typical)

🏗️ High-Value Application Scenarios

1. Next-Gen Data Center Architecture

Single lambda migration trend

Reduce module complexity

2. Leaf-Spine Networks

High-density 100G links

Lower cost per port

3. Cloud & Hyperscale Data Centers

Optimized for large-scale deployment

Power-efficient

4. CWDM4 Replacement Projects

Same 2km reach

Lower TCO (Total Cost of Ownership)

💡 Why Choose FR?

👉 Traditional choices:

CWDM4 → multiple wavelengths, higher cost

SR4 → short distance + MPO complexity

👉 FR offers:

Single wavelength simplicity

Lower module cost

Lower power consumption

Easier mass deployment

✅ Best for cost-sensitive large-scale 100G deployments

🧩 Complete 100G SMF Solution

✅ Optical Modules

Cisco QSFP-100G-FR-S=

Cisco QSFP-100G-DR-S= (for shorter 500m scenarios)

✅ Cabling

LC-LC single-mode fiber (OS2)

✅ Equipment

100G switches

Leaf-spine architecture

👉 FR = future-ready 100G architecture trend

📊 Technical Specifications

Parameter	Specification
Form Factor	QSFP28
Data Rate	100 Gbps
Wavelength	1310 nm
Max Distance	2 km
Connector	LC Duplex
Fiber Type	Single-mode
Power Supply	3.3V
Operating Temp	0°C to +70°C
DOM Support	Yes
Compliance	QSFP28 MSA, 100GBASE-FR

❓ FAQ

Q1: What is QSFP-100G-FR-S used for?

It is used for 100G transmission over SMF up to 2km using single lambda technology.

Q2: Is FR better than CWDM4?

For many deployments, yes — it offers lower cost and simpler design, while maintaining the same distance.

Q3: What is the difference between FR and DR?

FR supports 2km, while DR is typically limited to 500m.

Q4: What fiber is required?

Standard OS2 single-mode fiber.

Cisco QSFP-100G-FR-S, QSFP-100G-FR-S=, 100GBASE-FR QSFP28, single lambda 100G module, PAM4 100G transceiver, 100G 2km optical module, CWDM4 alternative

🚀 Get a Quote for Your 100G Deployment

👉 Planning a next-gen 100G architecture?

✔ Lower cost vs CWDM4 ✔ Simplified optical design ✔ Scalable deployment