sfp 10g lr s vs sfp 10g lr：What's the difference?

Among the wide range of optical modules available for data communications and telecommunications, the SFP-10G-LR and SFP-10G-LR-S—two variants of 10 Gigabit SFP+ transceivers produced by Cisco Systems—stand out for their high performance and versatility. Both modules support 10 Gigabit Ethernet applications and are designed for long-reach transmission over single-mode fiber, but there are also subtle differences.

The SFP-10G-LR (Long Reach) transceiver module connects with single-mode fiber for up to 10 kilometers. It operates on a standard wavelength of 1310nm. This module can be categorized as an enterprise-class product, designed for high-speed communication links requiring 10 Gigabit Ethernet or other high-end networking equipment over long distances. It is primarily offered for enterprise and service provider applications such as campus networks or data centers.

On the other hand, the SFP-10G-LR-S belongs to the Cisco S-Class optics range, offering similar technical capabilities to the SFP-10G-LR. It also supports the 10 Gigabit Ethernet protocol and provides a link distance of up to 10 kilometers over single-mode fiber. The "S" in its nomenclature symbolizes 'standard temperature range and digital optical monitoring (DOM) support,' which provides real-time monitoring of transceiver operational parameters.

However, what distinguishes SFP-10G-LR-S from the SFP-10G-LR is its application and pricing. The S-Class optics, including the SFP-10G-LR-S, have been designed as a more cost-effective solution for networking on a smaller scale like within an enterprise's data center, intranet, or campus network. Therefore, these modules are typically cheaper than those of the SFP-10G-LR type, albeit offering comparable functionality.

In essence, while both these transceiver types essentially provide the same technical capabilities and serve to facilitate high-speed data transmission over long distances, the main differences lie in their intended applications and price points. The selection between the two ultimately depends on the specific network requirements, application type, and budget constraints. As data communication continues to evolve, the requirement for both these high-quality transceiver modules, according to their respective applications, will continue to rise.

SFP-10G-SR-S vs SFP-10G-SR

Similarities

From the physical appearance aspect, SFP-10G-SR-S and SFP-10G-SR look exactly the same. They have common in dimensions and form factors, both of them feature the SFP+ form factor. From the specification aspect, they are also almost the same, both of them allow transmission distances up to 300m over OM3(400m over OM4).

Differences

The major differences between SFP-1OG-SR-S and SFP-10G-SR are working temperature and cost. SFP-10G-SR-S S-class only allows a commercial temperature range from 0 to 70°C (32 to 158°F), whereas SFP-10G-SR supports an extended temperature range from -5 to 85°C (23 to 185°F), and an industrial temperature range from -40 to 85°C (-40 to 185°F).

Since the SFP-10G-SR support a wider operation temperature range than SFP-1OG-SR-S, SFP-10G-SR costs more than SFP-1OG-SR-S. And SFP-1OG-SR-S is more popular in enterprise networks and campus networks because these application scenarios have much less strict requirements in the operating temperature and also save a lot.

The other differences are that SFP-10G-SR-S doesn’t support FCoE(Fiber Channel over Ethernet), OTN (optical transport network), and WAN-PHY. Moreover, SFP-10G-SR is under TAA compliance while SFP-10G-SR-S is not.

1、 The Same Points

The SFP-10G-LR-S optical module and the SFP-10G-SR-S optical module both have a rate of 10.3125 Gbps. Both of them can be applied to 10 Gigabit Ethernet, SDH and SONET networks, and their interface types are LC Duplex.

Both the SFP-10G-LR-S and SFP-10G-SR-S optical modules support the DOM function, which is digital diagnostics. It helps network administrators monitor and report the operating status of the optical module in real time, including the temperature of the optical module. , laser bias current, etc.

2、The Different Points

The wavelength of the SFP-10G-LR-S optical module is 1310nm, and the transmission distance can reach 10km when it is used with a single-mode optical fiber. And the wavelength of an SFP-10G-SR-S optical module is 850nm when it is used with an OM3 multi-mode optical fiber. The transmission distance up to 300m. Therefore, SFP-10G-LR-S optical module is mainly used for long-distance transmission, and the SFP-10G-SR-S optical module is only used for short-distance transmission. But they do not support FCoE link, it is recommended that everyone in accordance with the actual needs of the transmission distance could choose the right light module.

The laser type of SFP-10G-LR-S optical module is DFB 1310nm, whose transmitted optical power is -8.2 ~ 0.5dBm and the receiving sensitivity is <-14.4dBm. The laser type of SFP-10G-SR-S optical module is VCSEL 850nm whose transmitted optical power is -6 to -1dBm, and the receiving sensitivity is <-11.1dBm. The lasers of these two optical modules are different. The application range of DFB lasers is wider than that of VCSEL lasers. At present, the most commonly used lasers in the field of optical communications are FP lasers and DFB lasers. However, VCSEL lasers have not been widely used due to the disadvantages of complicated manufacturing processes and insufficient output power.

There are many manufacturers of SFP-10G-SR/LR, of which the representative is Cisco, and Cisco's switches also occupy a relatively large market share. But in the actual selection process, in addition to the IEEE standard and transmission distance, we also need to consider some other factors, such as compatibility and cost.

There are many Cisco SFP-10G-SR/LR optical modules manufactured by third-party manufacturers on the market, but they are not all compatible and may not be used in the SFP connector of the switch. When purchasing optical modules, It must be guaranteed that it is compatible with the switch.

The second factor is the cost problem. Many users will choose the original optical module. Of course, it is best if the funds are sufficient. The SFP-10G-SR/LR optical module offered by SOPTO has become a more and more popular choice due to its high cost-efficiency and good quality.

 

What are SFP-10G-SR and SFP-10G-SR-S?

What is sfp 10g lr s?

SFP-10G-SR-S

SFP-10G-SR-S is a derivative model of SFP-10G-SR, which can be considered an enterprise-class version of 10GBASE-SR. It was first introduced by Cisco and  classified as Cisco S-class optics. So here comes the question: What the differences are between SFP-10G-SR-S and SFP-10G-SR, and how to choose between them. The following will tell.

SFP-10G-SR-S Datasheet

In the evolving landscape of data center networking and telecommunications, the requirement for high bandwidth and reliable interconnects is escalating. To meet these demanding needs, optical transceiver modules serve as critical components of modern digital infrastructures. Among them, the Cisco SFP-10G-LR-S stands out as a versatile solution in adapting to these demands.

The SFP-10G-LR-S is a transceiver module part of Cisco's S-Class series, designed to offer an affordable yet efficient solution for high-speed data transmission. It is part of the Small Form-Factor Pluggable Plus (SFP+) family, which supports data rates up to 10 Gigabits per second (Gbps). The "LR" in its name denotes "Long Reach,” and the "S" stands for standard temperature range and digital optical monitoring (DOM) support.

This module operates on a wavelength of 1310 nanometers and can transmit data over single-mode fiber for distances up to 10 kilometers. With its small form factor and hot-pluggability (the ability to plug or unplug the transceiver without powering off the system), the SFP-10G-LR-S provides a flexible and convenient solution for a variety of applications, including 10G Ethernet and other high-bandwidth operations.

One of the key features of the SFP-10G-LR-S is its DOM support. DOM allows users to monitor the real-time operating parameters of the SFP, such as optical input/output power, temperature, laser bias current, and supply voltage. This ability gives network administrators valuable insight into the network's performance, assisting in troubleshooting and ensuring optimal operation.

While the SFP-10G-LR-S delivers similar performance to other 10GBASE-LR transceivers, its main appeal lies in cost-effectiveness. The S-Class series is generally less expensive than the enterprise-class models, making SFP-10G-LR-S an attractive choice for more budget-conscious applications or smaller-scale operations.

In summary, the Cisco SFP-10G-LR-S transceiver is a key player in the realm of optical communication. While it ensures high-speed, reliable data communication over long distances, its additional features like DOM support and cost-effectiveness make it a valuable asset for enterprises and data centers alike. As networks continue to demand higher speed and more complex operations, devices like SFP-10G-LR-S will play an increasingly significant role in facilitating these high-speed data communication needs. By making these advanced networking capabilities accessible to a broader range of users, the SFP-10G-LR-S is opening new avenues for innovation and growth in our digital age.

 

What is sfp 10g lr?

SFP-10G-SR

SFP-10G-SR, also known as 10GBASE-SR, is designed for 10 Gigabit short-range distance fiber optic transmission, which is the highest-selling 10G SFP+ optics. 10GBASE-SR allows a short distance link of 300 meters over OM3 multimode fiber (MMF) and 400 meters over OM4 multimode fiber. The centra wavelength of 10GBASE SR SFP+ module is 850nm.

SFP-10G-SR Datasheet

In the sophisticated realm of digital communications, the high-capacity channels of today's data centers and communication networks are driven by various innovative technologies. One such technology is the SFP-10G-LR module - a revolutionary optical transceiver responsible for fast and long-distance communication tasks.

'SFP-10G-LR' stands for Small Form-factor Pluggable 10G Long Reach. Member of the SFP+ family, which is an improved version of the original SFP transceivers, the SFP-10G-LR module is designed to support 10 Gigabit Ethernet communication over long distances. Operating using the 1310 nm wavelength, this module can deliver data rates of 10 Gbps over a distance of 10 kilometers using single-mode fiber optic cables.

The term 'LR' denotes 'Long Reach', highlighting the SFP-10G-LR module's capability to handle communication over expansive distances. This long-reach capability, combined with high-speed data transmission, makes these modules instrumental in wide-area network applications, facilitating rapid data exchange between servers in geographically dispersed data centers.

SFP-10G-LR modules are hot-pluggable, meaning they can be connected or disconnected from a switch or server without the need to power down the device. This feature allows for seamless upgrades and system maintenance, contributing to better network efficiency and uptime.

These modules adhere to the Multi-Source Agreement (MSA) standards, ensuring interoperability with different network equipment from various manufacturers. This compliance fosters flexible and cost-effective network solutions, permitting IT professionals to pair devices and systems from different vendors.

SFP-10G-LR transceivers also support Digital Optical Monitoring (DOM) function, which enables real-time monitoring of transceiver parameters such as temperature, transmission and received power, supply voltage, and laser bias current. This capability lends significant control over the network operations, allowing quick troubleshooting and operational optimization.

In conclusion, the SFP-10G-LR transceiver module manifests a substantial leap in communication technology, offering high-speed, long-reach data transmission solutions. This technology is critical in shaping our digital world, supporting the high-frequency communications that modern businesses, governments, and other institutions rely on. As our communication networks continue to evolve with surging data consumption, adopting technologies like the SFP-10G-LR will be key to ushering in future advancements.

 

How to Choose Between SFP-10G-SR-S and SFP-10G-SR

If you're hesitating about buying SFP-10G-SR-S or SFP-10G-SR, the following buy guide can help you. The following lists the features and functions that only SFP-10G-SR supports. If you have any requirements for these, you should choose SFP-10G-SR-S, otherwise, SFP-10G-SR-S is also a good and cost-saving choice.

• Support FCoE, OTN, or WAN-PHY.

• TAA compliance.

• Strict operating temperature requirement. EXT (-5 to 85°) or IND (-40 to 85°C).

• Optics deployed in non-temperature controlled environments, such as rugged/ industrial (RGD).

Conclusion: 10G SR vs LR vs LRM vs SR-S vs LR-S

The major similarities and differences of 10GBASE SR, LR, LRM, SFP-10G-SR-S and SFP-10G-LR-S SFP+ transceivers can be concluded as follows.