An AMA (Automatic MessageAccounting) function that accumulates AMA data, resulting in a less than detailed AMA record.
积累AMA(自动信息计费)数据的一种AMA功能,产生的计数少于详细的AMA纪录。
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Carriers used to use a lot of paper tape for AMA (Automated MessageAccounting) purposes in recording long distance calls, but that's all been replaced by magnetic tape and other electronic media.