For CONFIDENTIAL, SECRET and TOP SECRET systems, agencies must: have VTC and VoIP devices authenticate to the call controller when registering; turn off phone auto-registration and permit only devices on an allow list of authorised devices onto the network; block unauthorised devices by default; switch off all functionality that is unused or prohibited; and require individual logins for IP phones.
This control maps to 2 controls across 1 other frameworks. If you already hold one of them, the evidence you collected for it is the starting point here rather than new work.
Every mapping shown was judged rather than inferred from wording similarity, and the ones that failed review are published too. See the coverage reports and what was rejected.
The graph holds this control, the 2 it maps to, and the evidence behind each claim, over MCP and REST.