Train Control Telemetry Systems (Standard)

Type of product being suggested:
Title of product being suggested:
Train Control Telemetry Systems
Date of suggestion:
Reason for suggestion:
Uniformity across multiple products; to align with signalling principles and security standards being developed
Sponsored by RISSB Standing Committee:
Transport mechanism between interlocking/field equipment and control equipment

  • Common interface to interlockings and control systems in an open environment
  • Alarm management, hierarchy and masking
  • Vital to non-vital systems
  • Vital to vital interface, excluding protocol
  • Networked and point to point
  • Network based – radio and physical
  • RAMS
  • Logging (scanning and transmitting sequence)
  • Time synchronisation
  • Response performance and latency, QOS
  • Failure modes, stale data timeouts
  • EMC issues
  • Reliability design considerations
  • Use of third party infrastructure /public communications networks
Hazard identification:
1 Maintenance activities to restore control systems working in parallel with emergency train operations – leading to safety incidents
2 Poor reliability leading to train delays
3 System failure
4 Incorrect data being loaded leading to failure
5 Network failure
6 Introduction of new COTS (Commercial off the shelf) products and versions


Safety risk
Management of alarms in failure situations
Minimising the risks associated with degraded working
Interoperability / harmonisation
Open interface between signalling systems and telemetry vendors.
Lifecycle benefits by using standardised systems