# GSM - Global System for Mobile communication GSM is a standard developed by [[ETSI - European Telecomunications Standards Institute]] for protocols of [[2G - Digital cellular telephony|2G]]. The most common [[2G - Digital cellular telephony|2G]] technology was the [[TDMA - Time-division multiple access|TDMA]]-based [GSM](https://en.wikipedia.org/wiki/GSM "GSM") standard, used in most of the world outside Japan. ## Beacon Channel [[Beacon Channel]] [[GSM BCCH - GSM Broadcast Control Channel]]