An operator sells a service that also runs across other companies' networks: wholesale, transit, competing. The systems that order, provision and bill it must therefore talk not only to each other but to the systems of other companies, under rules shared by the whole industry.
In telecommunications we built an inter-operator platform compliant with the TM Forum standard. For a client operating in the wholesale market we built a product catalogue management system in the OSS layer. For an internet service provider in the US market we refactored an infrastructure monitoring system for scalability. The challenges described below are a picture of the situation in the sector, not a list of things we have already solved for these clients.