The present document specifies the management aspects of Customer Administration (CA) for Public Switched
Telephone Network (PSTN), and public Integrated Services Digital Network (ISDN), in line with descriptions in
ETR 047 [67], and restricted to service provisioning and service configuration only. The aspects of the local exchange
part of V5 configuration management influenced by the present document are considered as well.
The model is restricted to the Operations System to Network Element (OS/NE) interface.
Although not included in the present document, the model has been designed to be extendible for Private Branch
Exchanges (PBXs), Centrex, mobile, Asynchronous Transfer Mode (ATM), cordless and Universal Personal
Telecommunication (UPT) customers.
Since Centrex is no standardized service and implementations vary, no Centrex related definitions are introduced into
the normative part of the present document. In the informative annex D, a modelling approach for Centrex is given.
The ISDN teleservices, bearer services and supplementary services included in this issue of the model have been
selected from ETR 010 [65], to test the structure of the model and ensure that it is applicable to all services.