Hi… What do you mean “to know the traffic in Erlangs”? Capacity needs to be _calculated_ whereas traffic is just _recorded_
At the OMC, or in any system to manage the raw counters and/or KPIs, you should be able to find some data that has been aggregated to let you know the usage of resources. Ask the people who manage this tool in your company, or some optimisers should be able to answer as well… But I think the name of the tables in this tool will be different from 1 company to another.