CQM Graphs: Difference between revisions

Historical graphs are kept which makes it easy to see patterns is line problems. Here we can clearly see that the line is being affected by something causing it to drop in the evenings. This could be something local causing interference and is less likely to be a PSTN problem. This could be something electrical being used in the evenings, such as putting the dishwasher on after dinner. Knowing that a line drops regularly at a specific time will help diagnose the source of the problem for example, checking what electrical devices are used in the evening.