CQM Graphs: Difference between revisions
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|Purple on the graph is off line, and this can be short blips if a line loses sync or longer. Notes (pins) are often added to graphs to explain why a line is off line if we know, especially when we are investigating a fault. The notes on this graph told when the BT engineer arrived and left. |
|Purple on the graph is off line, and this can be short blips if a line loses sync or longer. Notes (pins) are often added to graphs to explain why a line is off line if we know, especially when we are investigating a fault. The notes on this graph told when the BT engineer arrived and left. |
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|[[File:Cqm-heating-small.png]] |
|[[File:Cqm-heating-small.png]] |
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|'''Regular drops repeating every day''' e.g. Central Heating causing drops. [ |
|'''Regular drops repeating every day''' e.g. Central Heating causing drops. [[:File:Cqm-heating.png |View a week of these graphs]] Here there is interference as the central heating goes on, the drops are regular - twice a day, at the time the heating goes on. This actually highlighted a fault in the central heating for this customer as the graphs showed no drops for 2 days running! |
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