Cisco SFP-10/25G-CSR-S Compatible 10/25GBASE-SR SFP28 850nm 100m Duplex LC MMF DOM Dual-rate Optical Transceiver Module

Overview

Network upgrades often present a difficult choice: replace all hardware immediately or struggle with mixed speeds. Our **Cisco SFP-10/25G-CSR-S Compatible** transceiver solves this by offering versatile, **Dual-Rate 10/25G** connectivity. Designed for modern data centers transitioning from 10G to 25G Ethernet, this optical module allows you to deploy 25G-ready infrastructure today while maintaining backward compatibility with legacy 10G servers.

We engineer these modules to meet stringent MSA standards, ensuring they function identical to the OEM **Cisco 10/25GBASE-SR** transceivers. By utilizing high-quality **850nm VCSEL lasers**, they deliver reliable data transmission over multimode fiber (MMF). Consequently, network administrators can future-proof their Top-of-Rack (ToR) switches without the fear of hardware obsolescence or compatibility lockouts.

Key Features

• Dual-Rate Operation: Supports both **10.31 Gbps** and **25.78 Gbps**, enabling flexible migration strategies.
• Extended Reach: Transmits data up to **100m on OM4** fiber and 70m on OM3 at 25G speeds.
• Cisco Compatibility: Pre-coded to be fully recognized by **Cisco Nexus** and Catalyst switches as SFP-10/25G-CSR-S.
• Digital Diagnostics: Features built-in **DOM/DDM** for real-time monitoring of voltage, laser bias, and temperature.
• Hot-Pluggable Design: Allows for easy installation and replacement without disrupting the entire switch operation.

Applications

The primary application for this **10/25G Dual-Rate SFP28** is in enterprise data centers undergoing speed upgrades. For instance, you can install these modules into new **25G switches** but connect them to existing servers with 10G Network Interface Cards (NICs). Eventually, when the servers are upgraded, the same transceiver can be reconfigured via the switch to run at full **25Gbps speed**.

In addition, these modules are ideal for high-performance computing (HPC) clusters and service provider networks. They facilitate high-density interconnections between leaf and spine switches. Because they handle two speed tiers, inventory management becomes significantly simpler. Thus, field technicians only need to carry one type of **multimode transceiver** to service multiple equipment generations.

Specifications

Cross-Platform Compatibility

This optical module is engineered for broad interoperability. While it is primarily coded as a **Cisco compatible** unit, its hardware architecture allows it to serve as a functional equivalent for dual-rate or standard 25G-SR modules from other major networking manufacturers. This versatility simplifies procurement for multi-vendor environments.

Advantages

Choosing a **compatible SFP-10/25G-CSR-S** offers significant cost savings compared to OEM branded optics, without sacrificing performance. We rigorously test each unit in an original Cisco switch environment to verify **EEPROM coding** accuracy. This ensures that your switch will not reject the module or flag “unsupported transceiver” errors upon insertion.

Moreover, the robust design includes excellent EMI shielding and low power consumption (typically under 1W). This efficiency reduces the thermal load in high-density racks, lowering overall cooling costs. In practice, deploying these **reliable optical transceivers** ensures stable link uptime and consistent throughput for your mission-critical applications.

FAQ (Technical & Product Questions)

1. What does “CSR-S” stand for in the Cisco part number?

In Cisco terminology, **CSR** typically denotes “Cost-Reduced” or a variant of Short Reach (SR) that supports dual rates, while the **S** indicates “S-Class,” which is an enterprise-grade module designed for common data center applications.

2. Can I use this dual-rate module in a 10G SFP+ port?

Yes, this **SFP28 module** is mechanically compatible with SFP+ ports. However, the port must support the module, and the link will operate at 10Gbps. Compatibility depends on the specific switch hardware.

3. Do I need to manually configure the speed on my switch?

Often, yes. While the module supports both speeds, many switches require you to manually set the port speed (e.g., `speed 10000` or `speed 25000`) to ensure the **dual-rate transceiver** locks correctly.

4. What is the maximum distance this module covers on OM3 fiber?

When operating at **25Gbps**, the maximum distance on OM3 fiber is approximately 70 meters. If running at 10Gbps, it can reach up to 300 meters on the same OM3 cabling.

5. Is this transceiver compatible with Cisco Nexus 9000 series?

Absolutely. Our **Cisco compatible modules** are extensively tested on Nexus 9000 and 3000 series switches to ensure seamless recognition and performance.

6. Does this module support Forward Error Correction (FEC)?

The module itself is a physical layer device that passes data. However, for **25G links**, enabling FEC (RS-FEC or FC-FEC) on the host switch is often recommended to improve data integrity over longer cable runs.

7. How does dual-rate capability help with future upgrades?

It allows you to buy one module type for both current 10G needs and future 25G needs. You can install them now running at 10G, and switch them to **25G Ethernet** later via software configuration, saving hardware replacement costs.

8. What connector type is required for this module?

This module requires a standard **LC Duplex** connector. It is designed to work with standard multimode fiber patch cables (OM3 or OM4).