Level 2 specification
NR/L2/TEL/30024
Fault Priority, Restoration Time and Accountability for Telecommunications Equipment (formerly NR/SP/TEL/30024)
Issue 5, 06 December 2025 · Maintenance & faulting
Clause map — what each clause deals with
| 1 | Purpose | Framework for delivering and managing telecoms services — fault priority and restoration |
| 2 | Scope | Applies to all NR-owned/managed telecoms equipment |
| 3 | Roles and responsibilities | Roles — Route Control, maintainer, DDaT |
| 4 | Acronyms | Acronyms |
| 5 | Terms and Definitions | Terms and definitions |
| 6.1 | Network Rail Route Control | Route Control duties on failure reports |
| 6.2 | The Maintainer | Maintainer duties — MyIM/FMS |
| 6.3 | DDaT SFMO and Operations – Actions, Reporting and Process for Service | DDaT SFMO actions and reports |
| 6.4 | DDaT NMC | DDaT NMC duties |
| 7 | Fault Priority Codes, Response and Restoration Times | Fault priority codes with response and restoration targets |
| 8.1 | Service Level Availability Targets | Service availability targets |
| 8.2 | Example calculation of GSMR radio access network availability | Worked example — GSM-R RAN availability |
| 9 | Progress reporting | Progress reporting on faults |