What is GSM?
GSM stands for Global System for Mobile Communication. It is a digital mobile telephony system used for trans-receiving of the data and voice signals and is a second generation standard for mobile networks.
The GSM standard operates on three different carrier frequencies 900MHz, 1800 MHz and 1900MHz. 900MHz band is used for original GSM system and the 1800 MHz band is added to support the increasing number of customers.
GSM supports data transfer speeds of up to 9.6 kbit/s, allowing the transmission of basic data services such as SMS (Short Message Service). Another major benefit is its international roaming capability, allowing users to access the same services when traveling abroad just as at home. This gives consumers seamless and same number connectivity in more than 214 countries. GSM satellite roaming has also extended service access to areas where terrestrial coverage is not available.