In the field of 10G optical modules, SFP-10G-SR and SFP-10G-SR-S are two common models, with only an “S” suffix in their names, but there are key differences in actual applications. This article will analyze the difference between the two from the aspects of technical parameters, compatibility, and application scenarios.
Comparison of Basic Parameters
Both are multi-mode fiber modules, supporting 850nm wavelength, 10Gbps transmission rate, and a maximum transmission distance of 300 meters (OM3 fiber). The core indicators such as physical interface and optical power are basically the same, and both comply with the IEEE 802.3ae standard. The main difference between SFP-10G-SR and SFP-10G-SR-S lies in compatibility design and brand adaptation.
Compatibility Differences
SFP-10G-SR:
This is a universal 10G SFP+ optical module, which is usually compatible with multi-brand devices (such as Cisco, Huawei, H3C, etc.) and adopts industry standard protocols. Users can flexibly deploy switches or routers from different manufacturers, suitable for mixed-brand network environments.
SFP-10G-SR-S:
The suffix “S” usually represents a specific brand optimized version. For example, some Cisco devices require the use of modules with the “-S” suffix to ensure compatibility through firmware verification. Such modules may be locked to support only specific brand devices, and may cause alarms or functional restrictions if used in third-party devices.
Temperature Range and Stability
Some manufacturers define the “-S” suffix as an extended temperature version. For example, the standard SFP-10G-SR operates at 0~70°C, while the SFP-10G-SR-S may support -5~85°C, which is suitable for industrial environments or high-density data centers. Please refer to the specific manufacturer’s documents for confirmation.
Cost and Procurement Channels
Original module:
As a brand customized model, the price of SFP-10G-SR-S is usually higher than that of the general SR module, and it must be purchased through official channels.
Third-party compatible modules:
To circumvent brand restrictions, third-party manufacturers will provide compatible versions without “-S”, which can reduce costs by more than 50%, but it is necessary to ensure that the device supports non-certified modules.
Application Scenario Recommendations
Enterprise-level network: If using a single-brand device (such as a full Cisco architecture), give priority to the SFP-10G-SR-S model to ensure stability.
Hybrid network/cost-sensitive scenario: General SR modules are more cost-effective, but compatibility needs to be tested in advance.
Harsh environment: Confirm the temperature specifications and choose the industrial-grade version if necessary.
Summary
The core performance of SFP-10G-SR and SFP-10G-SR-S is the same, and the difference is mainly reflected in the brand adaptation strategy and extended functions. Users need to make a comprehensive choice based on the device brand, budget and deployment environment. With the popularity of software-defined networks (SDN), some devices have lifted module restrictions through command lines, but this may affect the official warranty. It is recommended to weigh the decision between compliance and flexibility.
