ITU-T Recommendations

Recommendation ITU-T K.146 deals with the management of electromagnetic interference produced by electrified railway traction systems on telecommunication systems in DSL frequency bands. This Recommendation defines only a procedure to evaluate the acceptability of an electromagnetic DSL draft interference and gives: – the criteria defining the quality of service that has to be reached; – the limits of the commercial ADSL offer guaranteed by an Internet service provider in conjunction with a telecommunication operator if necessary, in the vicinity of a potentially obstructive railway; – the installation conditions of electrified traction and telecommunication systems under which the Recommendation applies. This Recommendation helps to establish a contract between Internet service providers in conjunction with telecommunication operators, if necessary, and railway operators in order to clearly share responsibilities, and, as a consequence, and if necessary, the relevant expenses for mitigation measures.