Understanding the compatibility of optical modules

flyinashely

Understanding the compatibility of optical modules [Copy link]

People who often buy optical modules know that optical fiber modules usually need to confirm the compatibility code, because there are currently two types on the market, one is a high-performance compatible module, and the other is the original switch brand optical module. 51)]The price gap between the two is quite large.

Let's take a brief look at

First of all, in fact, the optical module manufacturers of the two are the same. There are only a few optical module manufacturers with a relatively complete system in the world, such as Finisar and Aiwago. Whether it is a brand or a third-party manufacturer, they all ask a special optical module manufacturer (that is, a foundry) to make optical modules according to the market, protocols and standards. Those that do not meet the requirements will not be accepted by the market and will be directly eliminated, because the modules produced by the foundry OEM are the same as the products sold to other brands.

For example, the dual-fiber SFP+ 10km, the original factory cost is about 80 yuan. After the label is attached, due to the brand effect and the links of dealers and agents, the price to the customer is many times the factory price. It is conceivable that if the customer purchases directly from the OEM factory, how much cost can be saved.

But although branded optical modules are expensive, there is a reason for their high prices.OEMThe technology of standardized components of OEM manufacturers will add some innovative improvements, such as changing the link setting sequence, using encryption keys to verify legitimate components, strengthening the link detection scheme with specialized/non-standard parts, and implementing whitelists in the network operating system, so that their own switches only accept optical modules compiled by themselves, leaving users with only their supporting products..

However, third-party module vendors can independently implement decoding and coding by analyzing the modules. Basically, an OEM vendor adds only one or several codes to the module. Excellent compatible module vendors can master the codes of multiple OEM vendors at the same time and provide Providing compatible modules for multiple OEMs makes it much easier and more convenient for customers to purchase and install, but the cost is not increased much. .

How do compatible module vendors test the compatibility of compatible optical modules? The optical module will be tested for switch compatibility before shipment to ensure that each module is 100%compatible. We provide switches compatible with major brands of network equipment, such as Cisco, Juniper, Huawei, HP, H3C, Alcatel, sans-serif]MikroTiketc.

The quality of the optical module can directly affect the transmission effect of the optical fiber link. Although the quality of the original optical module is very good, its price is very expensive. Now many suppliers provide compatible optical modules that are completely comparable to the original optical modules, and the price is very advantageous, which can help users save a lot of costs.

masterliu

It should be necessary to look at the performance differences of different products: such as throughput, transmission delay, packet loss rate, splitting ratio, etc. In addition, it is necessary to look at the software differences

flyinashely

Yes, what you said makes sense. In addition, what you said should refer to whether the optical module has the data diagnostic monitoring interface (DDMI) specified in the SFF-8472 standard. The SSFF-8472 standard is a key factor in judging the quality and compatibility of compatible optical modules. It is formulated by the SFF committee to define the data diagnostic monitoring interface (DDMI) of the optical module, which can help us understand the parameters of the optical module in real time. When one or more data during the operation of the optical module exceeds the standard parameters specified by the manufacturer, it has an alarm function.

flyinashely

masterliu posted on 2018-5-18 15:23 It should be based on the performance differences of different products: For example, throughput, transmission delay, packet loss rate, splitting ratio, etc.; In addition, it is necessary to look at the software differences

:handshak Yes, what you said makes sense. In addition, what you are talking about should refer to whether the optical module has the data diagnostic monitoring interface (DDMI) specified in the SFF-8472 standard. The SSFF-8472 standard is a key factor in judging the quality and compatibility of compatible optical modules. It is formulated by the SFF committee to define the data diagnostic monitoring interface (DDMI) of the optical module, which can help us understand the parameters of the optical module in real time. When one or more data in the operation of the optical module exceeds the standard parameters specified by the manufacturer, it has an alarm function.

flyinashely

masterliu posted on 2018-5-18 15:23 It should be based on the performance differences of different products: For example, throughput, transmission delay, packet loss rate, splitting ratio, etc.; In addition, it is necessary to look at the software differences

:handshak Yes, what you said makes sense. In addition, what you are talking about should refer to whether the optical module has the data diagnostic monitoring interface (DDMI) specified in the SFF-8472 standard. The SSFF-8472 standard is a key factor in judging the quality and compatibility of compatible optical modules. It is formulated by the SFF committee to define the data diagnostic monitoring interface (DDMI) of the optical module, which can help us understand the parameters of the optical module in real time. When one or more data in the operation of the optical module exceeds the standard parameters specified by the manufacturer, it has an alarm function.

李敏-光模块

I want to ask, the price of the compatible module is really cheap, so are the materials the same as the original ones? Will there be an alarm during transmission? What should I do if an alarm occurs? The price is too tempting, and there is a three-year warranty, so tempting, I want to buy it

flyinashely

Li Min - Optical Module Published on 2018-5-18 16:15 I would like to ask, the price of compatible modules is indeed cheap, so are the materials the same as the original ones? Will there be an alarm during transmission? What should I do if an alarm occurs...

Hello, the materials are actually the same as the original ones. The original ones have their own design patents, and the design of standardized components will have its brand innovation. As for the alarm during transmission, it does not affect data transmission. The reason for the alarm is that when purchasing the optical module, both parties have not confirmed the model of the switch or compatible equipment, resulting in mismatch when the module DDM reads the information. As long as the compatible code is written correctly, the problem can be solved.

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honesty0303

Li Min - Optical Module posted on 2018-5-18 16:15 I would like to ask, the price of compatible modules is indeed cheap, so are the materials the same as the original ones? Will there be an alarm during transmission? If there is an alarm, what should I do...

Find me to buy it. The original one just says that the brand does not affect the use. Our modules are all shipped in batches and there have never been any problems.

honesty0303

All are divided into different brands, and the difference between brands is the difference between prices.