Equipment employing digital techniques, including "Asynchronous Transfer Mode" ("ATM"), designed to operate at a "total digital transfer rate" exceeding 1.5 Gbit/s;
1. 采用了包括“异步传输模式”（“ATM”）在内的数字技术的设备，其设计的“数字传输总速率”超过了1.5千兆比特/秒；