Factory emergency telephone
In the 1970 s, the signal equipment manufacturing plant in Katowice, Poland, produced a special emergency telephone, which was part of the factory equipment and used for emergency communication in industrial facilities. Originally designed for miners, it is suitable for rooms in methane mines and high risk of explosion. The cast iron structure is very strong, can resist mechanical damage, and is suitable for use in harsh industrial environments. Designed with durability in mind, it also has the ability to communicate securely in high-risk environments. Design and manufacturing reflected the emphasis on industrial safety and communication technology at that time, and was an important part of the industrial equipment of that era.
Cooper Telecom mobile phones in the 1980 s.
It was one of the representatives of mobile communication technology at that time. The equipment is usually large and heavy, but it marks the initial commercialization of mobile communication technology. Analog signal transmission technology was used, such as the AMPS system, which was the standard for the first generation of mobile communication networks at the time. Only voice calls can be made, the battery life is short, and it needs to be charged for a long time. Despite their relatively simple functionality, they offer users unprecedented freedom of mobile communication and become essential tools for business professionals and professionals. At that time, the price was relatively high, but its portability and mobility made it competitive in the market.
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