This Recommendation considering that it is desirable that faults affecting communication between stations on international switching networks (e.g. telex and gentex service) should be reported and cleared as quickly as possible; that it is necessary to unify the essential action to be taken and methods to be employed for locating and clearing faults; that, for this purpose, it is necessary to determine the essential testing equipment that is to be provided at the switching centres responsible for locating and clearing faults.