IBM® Tivoli® Network Manager Transmission Edition automatically discovers and maps layer 1 transmission networks. This network diagnostics software collects inventory information, physical connectivity and logical connection for Synchronous Optical Network (SONET) and dense wavelength division multiplexing (DWDM). Tivoli Network Manager Transmission Edition: Provides network visibility to help you visualize and manage complex networks and the services they deliver. Collects and distributes network data and integrates with operational support systems (OSS) and other workflow applications. Automatically generates and maintains network maps as the network changes, without manual intervention.