The Control, Command and Signalling (CCS) and Telecoms sector is an important component of the UIC Rail System Department.

Signalling in the broad sense constitutes the core of the railway system. This is subdivided into two main parts:

 One is Control, Command and Signalling, which covers standard signalling, ERTMS and its developments
 The other is Telecoms, which covers GSM-R and all the work on FRMCS specifications, in collaboration with 3GPP, ETSI, etc.

The areas of Operations and Asset Management are addressed within an adjacent sector, which covers the optimisation of railway operations and operating conditions of maintenance services.