Asynchronous transfer mode (ATM) is a cell-based transmission or transport technology. Cell-based means that information is carried in packages (or “cells”) of some particular size. Transmission or transport is the carrying of information through a telecom network from a sender to a receiver. ATM works by setting up a connection between the endpoints for the duration of a communication session. It emerged with the aim of becoming the basic infrastructure for all broadband communications. ATM integrates essential features, such as QoS and traffic loss prioritisation. ATM scales to very large telecom networks without a loss in quality. The scalability of ATM along with its widespread implementation has made it a “future-proof” option for telecom network infrastructure.