This TS defines a protocol used for manipulating data related to PSTN/ISDN Simulation services. The protocol is based on the XML Configuration Access Protocol (XCAP). A new XCAP application usage is defined for the purpose of manipulating PSTN/ISDN Simulation services data. The common XCAP related aspects that are applicable to PSTN/ISDN services are specified in this TS. The protocol allows authorized users to manipulate service-related data either when they are connected to IMS or when they are connected to non-IMS networks (e.g. the public Internet).