For this weeks question, I am going to return to a standard RA issue.
At a fixed line operator, it was identified that approximately 50% of CDRs, from a single switch country, were not being received by the mediation systems collector. After a full investigation, the X25 transmission was found to be faulty and hence only half of each CDR file was being transferred to the collector. The issue was identified without gaining access to the original CDR file from the switch or SS7 probe information. The issue had existed since the first day the switch had gone live so call volumes were as expected.
I am sure the majority of people reading this, will have a control in place to identify this issue, but for the benefit of those who don’t, please state your control for identifying the problem.