Network operations is a correlation problem. A transport link fails and every site behind it reports loss of signal; a power outage takes down a cabinet and the alarms cascade through RAN, backhaul and core. Rule-based correlation in the fault manager catches some of it, but rules drift out of date as the network changes, and the hardest incidents are the ones nobody wrote a rule for.
AIOps in telecom works when it has topology. Alarms correlated by time alone produce clusters; alarms correlated against the inventory of what connects to what produce a cause. So the first piece of work is always the network inventory and its quality, and we say so before anyone promises a model.