This Recommendation is concerned with the management of malfunction in systems and communications networks from the perspective of a provider of service and user of that service. In the Recommendation these malfunctions are referred to as 'troubles'. A report format is defined to allow a user to report a trouble, which will then be progressed to resolution by a provider. During the resolution by the service provider, the service user may determine the current state of resolution by issuing a request for this information. When cleared the provider may notify the user. Particular types of troubles are included, however, the use of this Recommendation by a particular application may require trouble types specific to that application to be used - this is catered for in this Recommendation.