UNDERSTANDING ATM

ATM is used by ISP and telecommunication companies to provide data, voice, and video services. Companies use ATM technology to transfer voice data using the VOIP technology. ATM is used for high data traffic throughout.For example, call centers and ISPs use ATM to serve customers and connect multiple sites.ATM is used with SONET to provide WAN connectivity to users at various locations across the globe.

ATM technology uses cells to transmit data.In ATM, the data to be transmitted is first broken into packets of variable length.Then, each of these variable-length packets is broken into a group of fixed-sized cells. Next, these cells also add a cell header to the cell.The cell header includes the destination address as well as the network's traffic characteristics.

Cell relay is widely used by media and communication companies for delay and jitter sensitive traffic, for example, voice and video.The size of ATM cells is 53 bytes, of which 5 bytes up to the header and the remaining data is of 48 bytes.This size of a cell is fixed.

The main advantage of an ATM cell is that data be switched more efficiently at a high data rate speed.

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