This weeks questions, isn’t going to look at a Revenue Loss issue, but instead a common issue for an RA department.
I was working for a Tier 1 fixed line operator and had just completed the development of an E2E CDR reconciliation. As with most of these types of solutions, the front end was also being used by the Finance department to forecast monthly traffic volumes. An issue was raised by Finance, that they felt our count of calls coming off the switches were wrong, as figures from the NOC(Network Operations Centre) which were much higher. The NOC had implemented an SS7 reporting tool, whereby they had probes attached to the entire transmission network, that recorded every signal sent from each of the switches. These signals were aggregated into dummy CDR’s from which they were able to identify the call volumes on any given day. Even when we removed the SS7 CDRs for which no switch CDR would have been created, the NOC still had figures 20% greater than those being seen by our solution. At this point we could have come to the conclusion that there must be a mass CDR suppression issue or CDR loss issue on the network, however we did something else – that proved our solution to be correct.
What would you do in this scenario?