Abstract: An interworking method for a telecommunication management network (TMN) manager system and agent systems provide end-to-end permanent virtual path service. The interworking method includes the steps of: building up a database, transferring a connection result to the TMN operator if an originating exchange is the same as a terminating exchange, finding an exchange connecting to a corresponding link and its link number if the originating exchange is different from the terminating exchange, integrating and transferring a result of a received response and information to the TMN operator if the found exchange is the terminating exchange, and repeating the method steps if the found exchange is a transit exchange. The end-to-end permanent virtual connection is setup by an instruction from a TMN operator by accommodating a request for service made by an originating/receiving subscriber.