A method is provided for verifying an Element Management System-Network Management System (EMS-NMS) interface. A pattern file is used in a test tool that can emulate an NMS for testing the respective EMS side of the EMS-NMS interface. The pattern file includes specifications on valid data which may be sent to or received from the EMS, such as valid data ranges, allowed actions on specific devices, and valid data values for objects for various software releases. The pattern file can be created based on the design interface specifications for new EMS and NMS software releases, which provides a significant benefit because it allows interface verification to be decoupled from EMS and NMS verification, which can greatly shorten the verification cycle of new EMS/NMS software releases.
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