Hello,
Personally I don’t consider ‘Provide Satellite communication means’ very close to ‘Provides Satellite and Internal telephony services’. The scope of the latter is wider than the scope of the former.
Generally speaking, Capabilities and Functions are both concepts used to describe behavioral expectations. But the abstraction level of Capabilities is higher than the Function’s. Furthermore, a Function can contribute to several Capabilities.
Systematically creating high-level Functions for Capabilities is redundant and not always useful.
Hope it helps,