OT, IT and Telecom resilience: two stacks depend on one shared foundation
Operational technology and information technology both rest on the telecom layer. Each stack names what it needs, what it serves, and how it fails when the shared dependency breaks.
Resilience is a function of the dependency chain, not of any single stack. The map names the chain so the failure mode is visible: when telecom drops, both the operational and information stacks above it go with it.