Go into General Admin and look for Call Services. You can only assign one DN per line to auto display CLID. Lines must appear & ring at the CLID DN. All others must use F811 to see CLID before answering.
It's definitely available I have a 3X8 DR5 at my house, with a Flash Mini, I installed in 1999. CLID all the time, just had to back the AA to 2 rings with all tels appear only.
I believe there is two versions of DR5, something in nagging in the back of my head that I heard there is an old DR5 it will only display on one phone and the newer one does display on all sets.
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