为何出现超长计费话单龚政我局使用的ＭＳＬ－１ＸＴ型数字程控交换机以端局形式接入市话网。在日常例检时，经常发现有部分出中继示忙，却没有用户占用，而在计费计算机上发现经常有通话时间很长的话单。经观察发现这些话单大多数在备注一栏中有ＡＴＴＮ（话务台）出现，... Why there is a long billing bill Gong government bureau using the MSL-1XT digital program-controlled switches to the end office access to the local network. In the daily routine inspection, it is often found that some out of the relay show busy, but no user occupancy, and found in the billing computer often have long talk time bills. After the observation that most of these bills in the notes column ATTN (attendant) appears, ...