GSM

GSM stands for Global System for Mobile Communications, which is the most widely used mobile telecommunications standard for voice and data transmission. GSM is a digital standard that enables wireless communication between mobile devices such as cell phones and other wireless devices.

GSM was developed as a global standard in the 1980s and is used in more than 190 countries today. The GSM standard provides reliable and secure communication with high voice quality and fast data transfer.

The main features of GSM include:

Digital voice transmission: Voice signals are digitized and transmitted in the form of digital packets, which ensures high voice quality and sound clarity.

Global availability: GSM is a standard that is accepted and supported in most countries of the world, allowing international compatibility and convenient use of mobile devices when traveling.

SIM cards: GSM uses SIM (Subscriber Identity Module) cards, which are used to identify the user and store his information, such as phone numbers, contacts and access codes.

SMS and MMS: GSM also supports text messages (SMS - Short Message Service) and multimedia messages (MMS - Multimedia Messaging Service), which allows sending and receiving text messages, photos, videos and audio recordings.

Data services: GSM also enables data transmission, such as Internet access, email services and other online applications, although its data rate is lower compared to modern mobile standards.

GSM gradually developed and expanded. It can be loosely considered as the predecessor of 3G (third generation) and 4G (fourth generation) mobile standards, which enable even faster data transfer and more advanced functions. Nevertheless, GSM remains an important standard in mobile telecommunications and provides basic mobile connectivity for many users around the world.