Have a look at 3GPP and ITU specifications. Below are examples. You can get the specifications via a Google search.
ITU-T Recommendation E.880:
“Field data collection and evaluation on the performance of equipment, networks and services”
ITU-T Recommendation X.731:
“Information technology – Open Systems Interconnection – Systems Management: State management function”.
ISO 8571: “Information processing systems – Open Systems Interconnection – File Transfer, Access and Management”.
GSM 12.04: “Digital cellular telecommunications system (Phase 2+) (GSM); Performance data measurements”.
GSM 12.06: “Digital cellular telecommunications system (Phase 2+) GSM network configuration management”.
3GPP TS 32.300: “Telecommunication management; Configuration Management (CM); Name convention for Managed Objects”.
3GPP TS 32.302: “Telecommunication management; Configuration Management (CM); Notification Integration Reference Point (IRP): Information Service”.