How to solve the problem of the abnormal temperature of the optical module
The optical module is greatly affected by the temperature during operation. If the operating temperature of the optical module is too high or too low, the optical power will generally decrease, the sensitivity will become lower, and the eye pattern will become worse. In severe cases, the communication data will be lost. If there is an error, because the temperature of the optical module is not within the normal range, it will alarm, indicating that the optical module is in a bad condition, the switch will stop sending data, and will not resend/receive data until the optical module returns to normal working conditions. In addition, it will accelerate the aging of internal devices, reduce the life of the optical module, and even directly burn the optical module in severe cases. Therefore, in different application environments, optical modules with corresponding temperature levels must be selected to avoid failure of optical modules.
The operating temperature of the optical module is divided into three types:
Commercial temperature (0-70°C): used in data centers and enterprise computer rooms. Because air conditioners are installed in data centers and computer rooms to maintain room temperature
Extended temperature (-20-85°C): If using outdoor nodes in tropical regions, consider extended temperature modules.
Industrial-grade temperature (-40-85℃): used in environments with large temperature changes such as outdoors, remote mountainous areas, tunnels, etc., industrial-grade optical modules will import temperature compensation software, which is used to ensure that the optical module has a stable working current Supply, when the temperature changes, the temperature compensation software will come into play. In actual use, commercial-grade temperature and industrial-grade temperature are widely used.
Generally speaking, optical modules and communication equipment will generate heat when they work. If an optical module with a suitable temperature level is selected, it is rare to encounter a situation where the operating temperature of the optical module is too low. In actual use, it is common that the operating temperature of the optical module to be too high. When the temperature of the optical module exceeds the normal range, the indicator of the corresponding port will turn red to alarm. At this time, the optical module should be replaced, and the alarm status of the port indicator should be observed after 5 minutes. If the red indicator of the port is off, it means that the optical module has returned to normal.
It is very important to maintain the optical module temperature standard and stability! We must also be careful not to buy inferior or second-hand optical modules. If the optical module uses inferior recycled materials and poor built-in design, it will lead to poor heat dissipation and frequent temperature anomalies. In order to reduce the occurrence of the abnormal temperature of optical modules, the usage scenarios must be clearly defined when purchasing optical modules, and optical modules with corresponding temperature levels should be selected. And try to avoid unnecessary losses, you should choose a reliable supplier to ensure the quality and performance of the optical module.
Influence of room temperature on the working temperature of optical modules
Temperature is an important indicator for detecting optical module performance. If the temperature of the optical module is too high, the switch will generate an alarm, which will affect the data transmission of the optical module, resulting in poor communication quality or stopping data transmission. The temperature of the optical module is too high, the main reasons are that the optical module components are not up to standard; the reuse of the second-hand optical module; the impact of room temperature on the optical module. Next, we will use experiments to understand how much room temperature affects the optical module.
Switch model: S5720-32X-EI-24S-AC
Test environment: indoor air conditioner is not turned on, room temperature is 36 ℃
Test duration: 24 hours
Test Module: 10G SFP+ SR
There are 12 test ports in total, and the average temperature is 69°C.
In response to this situation, we conducted a second experiment.
Switch model: S5720-32X-EI-24S-AC
Test environment: indoor air conditioner, room temperature 24 ℃
Test duration: 24 hours
Test Module: 10G SFP+ SR
There are 12 test ports in total, and the average temperature is 29°C.
It can be seen that the indoor temperature has a considerable influence on the optical module. Under normal circumstances, air conditioners are used in the equipment room to cool the equipment, but we also found that the temperature in some small corridor equipment rooms is very high, which not only affects the temperature of optical modules but also has a great impact on switches, routers and other equipment. big influence.
