GSM stands for Global System for Mobile Communications. It consists of mobile phones that communicate with each other through a radio system, a network switching center, and an operating and support subsystem. The mobile user connects to the network using the hardware called a SIM card. The mobile network owns the NSS (Network Service Station), which keeps track of caller location. The GSM radio system has many roaming agreements with foreign carriers.
A typical GSM telecommunications service involves short message service, which is a convenient feature of the GSM network. These messages can contain up to 160 characters. Short messages are like an advanced version of alphanumeric paging. They are stored in the network for delivery when the mobile is off or moves to a different coverage area. During the call, the user can review his or her messages by entering a personal security code.
The GSM standards have remained relevant in cellular connectivity to this day. GSM networks consist of several components, and each cellular provider has its own infrastructure. A device is equipped with a Subscriber Identity Module (SIM) that enables it to connect to a GSM network. The SIM allows a device to communicate with the nearest Base Station Subsystem. This means that GSM is still relevant in cellular IoT.
The Special Mobile Group was formed in 1982 to develop a common European standard for cellular phones. Its goals included high-speed mobile communication, international roaming support, hand-held devices, and low service costs. It was adopted as a telecommunications standard in 1988, and is still used today. There are also plans to add 5G to the system. And while GSM may have been a pioneering technology, its history is much more interesting.
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