GSM stands for Global System for Mobile communication. GSM is a mobile communication modem; it stands for global system for mobile communication (GSM). The idea of GSM was developed at Bell Laboratories in 1970.
It is a widely used mobile communication system in the world. GSM is an open and digital cellular technology used for transmitting mobile voice and data services operating at the 850MHz, 900MHz, 1800MHz, and 1900MHz frequency bands.
There are various cell sizes in a GSM system, such as macro, micro, pico, and umbrella cells. Each cell varies as per the implementation domain. There are five different cell sizes in a GSM network macro, micro, pico, and umbrella cells. The coverage area of each cell varies according to the implementation environment.
One of the main advantages of the GSM standard is the ability to roam and switch carriers by using individual mobile units (if partner networks are located in their destination).
The advantages of GSM are as follows −
GSM is extremely secure because its devices and facilities cannot be easily duplicated.
It has extensive coverage all over the world.
It can clear voice calls and efficient use of spectrum.
It is compatible with a wide range of handsets and accessories.
It can provide advanced features such as short messages, caller ID, Call hold, Call forwarding etc.
It is compatible with the Integrated Services Digital Network (ISDN) and other telephone company services.
The disadvantages of GSM are as follows −
The biggest disadvantage of GSM is that multiple users share the same bandwidth. This may cause interference, and due to interference, bandwidth limitation occurs.
The other disadvantage of GSM is that it may cause electronic interference. That is the reason why sensitive locations like hospitals and airplanes require a cell phone to be turned off; otherwise, it can create interference with the types of equipment of hospitals and airplanes.