Asynchronous Transfer Mode (ATM) is a switching technology that supports a wide range of applications and business needs - it can accommodate voice, video and data.

ATM is now grandfathered to Level 3 as at 31 December 2009.  This means that no new end-users may obtain the product.  Existing end-users will be able to keep instances of the product they have; they can order more instances where equipment and capacity allow; and, they may keep the product if they move where equipment and capacity allow.