scope:

This procedure applies to lineside infrastructure failure, fixed terminal failure and cab mobile failure and has been developed to all those using authorised radio systems on Network Rail infrastructure.

It excludes contingency plans for GSM-R cab mobile radio failures. Arrangements for train radio failures are included in train operator specific contingency plans for defective on train equipment produced in accordance with RIS-3437-TOM and RIS-3780-TOM.

PURPOSE

This procedure gives details and guidance of what to do in the event of radio communication failure to maintain an operational railway. It defines the actions required to be taken by Route Operations Control in respect of GSM-R system failures and planned outages.

This procedure makes sure that Contingency Plans are in place to:

• mitigate any potential impact to trains services resulting from a GSM-R system failure / outage;
• check contingency arrangements are implemented in a consistent manner.

In areas signalled using ERTMS Level 2, a failure of GSM-R may affect data messages required by the signalling system as well as voice communications.