AAL:ATM Adaption Layer,ATM适配层
ABR:Available Bit Rate,可用比特率
AG:Access Gateway,接入网关。关联词:SG、TG
API:Application Programming Interface,应用编程接口
ATD:Asynchronous Time Division,异步时分复用
ATM:Asynchronous Transfer Mode,异步传送模式。关联词:STM