Final answer:
The equipment characteristic that requires modules to be expandable and packaged for deployment is modularity-scalability.
Step-by-step explanation:
The theater deployable communications (TDC) equipment characteristic that requires equipment modules to be expandable and packaged for deployment in standard 19-inch rack mounted transit cases, vehicles, or shelterized configurations is modularity-scalability.
Modularity refers to the ability to separate components into distinct modules that can be easily added, removed, or replaced, while scalability refers to the capability of the equipment to expand or scale up to meet changing needs.
This characteristic ensures that the TDC equipment can be easily transported and configured for various deployment scenarios, providing flexibility and efficiency in communication operations.