Cisco QSFP-100G-SR4-S= 100G QSFP28 SR4 optical transceiver

🚀 High-Density 100G Short-Reach Connectivity | Cisco QSFP-100G-SR4-S=

The Most Proven 100G MMF Solution for Data Centers

The Cisco QSFP-100G-SR4-S= is a high-performance 100G QSFP28 optical transceiver designed for short-reach transmission over multimode fiber (MMF).

Operating at 850nm wavelength, it supports transmission distances up to 100 meters over OM4 MMF, making it ideal for high-speed intra-data center connections.

Using parallel 4-channel transmission (4×25G), this module delivers reliable and high-density 100G connectivity for modern data center architectures.

🔥 Why This Module Is Still Widely Used

✔ Need ultra-low cost 100G short-distance solution ✔ Already using MMF infrastructure ✔ Require high-density rack-to-rack connectivity

👉 SR4 = the most cost-effective 100G for ≤100m

⚡ SR4 vs SM-SR vs CWDM4 vs FR

Type	Fiber	Distance	Connector	Architecture
SR4	MMF	≤100m	MPO	Parallel
SM-SR	SMF	100–500m	LC	Simplified SMF
CWDM4	SMF	≤2km	LC	CWDM
FR	SMF	≤2km	LC	Single lambda

👉 SR4 = lowest cost + highest density for short reach

🧠 Key Features of Cisco QSFP-100G-SR4-S=

Data Rate: 100 Gbps

Wavelength: 850 nm

Distance: 100m (OM4) / 70m (OM3)

Connector: MPO/MTP-12

Fiber Type: Multimode fiber (MMF)

Architecture: 4×25G parallel transmission

Form Factor: QSFP28

Digital Optical Monitoring (DOM): Supported

Hot-swappable

🏗️ High-Value Application Scenarios

1. Data Center Rack-to-Rack Connectivity

≤100m ultra-short links

High port density

2. Leaf-Spine Architecture (Short Links)

Spine-to-leaf within same room

Low latency + high bandwidth

3. High-Performance Computing (HPC)

Short-distance high throughput

Stable parallel transmission

4. 100G Breakout Applications

100G → 4×25G breakout support

Flexible network design

💡 Why Choose SR4? (Strong Conversion Logic)

👉 Traditional alternatives:

CWDM4 / FR → longer reach but higher cost

DR → SMF required

👉 SR4 offers:

Lowest cost per 100G link

Mature and widely deployed technology

High-density MPO cabling

Ideal for existing MMF infrastructure

✅ Best for short-distance, cost-sensitive deployments

🧩 Complete 100G MMF Solution

✅ Optical Modules

Cisco QSFP-100G-SR4-S=

✅ Cabling

MPO/MTP-12 multimode fiber (OM3 / OM4)

✅ Equipment

100G switches

Leaf-spine architecture

👉 SR4 = best ROI for short-range 100G

📊 Technical Specifications

Parameter	Specification
Form Factor	QSFP28
Data Rate	100 Gbps
Wavelength	850 nm
Max Distance	100 m (OM4)
Connector	MPO/MTP-12
Fiber Type	Multimode
Power Consumption	~3.5W
Operating Temp	0°C to +70°C
DOM Support	Yes
Compliance	IEEE 802.3bm, QSFP28 MSA

❓ FAQ

Q1: What is QSFP-100G-SR4-S used for?

It is used for short-distance 100G transmission over multimode fiber (≤100m).

Q2: Is SR4 cheaper than CWDM4 or FR?

Yes, it is typically the lowest-cost 100G optical solution.

Q3: What is the difference between SR4 and DR?

SR4 uses MMF + MPO, while DR uses SMF + LC and supports longer distance.

Q4: What cable is required?

MPO/MTP-12 multimode fiber (OM3 or OM4).

Cisco QSFP-100G-SR4-S, QSFP-100G-SR4-S=, 100G SR4 transceiver, QSFP28 MPO module, 100G MMF optical module, 100G short reach solution, 100G breakout module

🚀 Get a Quote for Your 100G Deployment

👉 Planning a cost-effective 100G short-range network?

✔ Lowest cost per link ✔ High-density deployment ✔ Proven reliability