Wouldn't it be easier to just leave the DN CSS blank and configure the phone with a "line-blocked" CSS and the Device Profile with an open CSS? I'm not sure I like the idea of relying on the fact that phones are "not available" because they have a Device Profile logged in. That sounds like something that could easily change in even a minor CCM patch.
Yes, that's pretty much what I'm suggesting. Blocked CSS for Line, Open (or blank) CSS for Device.
DN "not available" probably isn't the most accurate technical term to use. I am referring to the database state of the DN when it is not active on a phone line or logged-in user profile. CFNA gets triggered immediately as there is no actual line to ring.
Doubt this will change in a minor patch, has behaved this way since at least CM4. But never say never :)
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