Abstract: A network management system supports network operators in their day-by-day provisioning, using a data synchronizer. First, the synchronizer initiates an inventory verification request specifying the verification data to be returned. The synchronizer then determines the network manager (NM) and the record keeping system involved in the inventory verification request and sends a request to the NM and the record keeping system for the inventory information of interest. The synchronizer receives current inventory data from the NM and inventory data from the record keeping system, and compares the current inventory data and the inventory data from the record keeping system to determine data discrepancies. A discrepancy may be corrected automatically or be the operator. An application of the synchronizer is for updating inventory data of a trunk integrated record keeping system (TIRKS) using an integrated network manager (INM).