A. ITNM has no capability to discover Layer 1 connectivity between devices.
B. To add Layer 1 connectivity, the appropriate agents need to be enabled in a 'Layer 1' sub-tree in 'Full Discovery Agents' tab in 'Network Discovery Configuration' GU
C. To be able to add Layer 1 connectivity to the topology ITNM Transmission Edition (TE) must be purchased in addition to ITN
D. Layer 1 connectivity can be discovered using specialized 'EMS Discovery'. Depending on the detailed requirements a custom collector development might be needed.