PolycomHDX9002_Comm_dr2_0_0 Global Phonebook only returns 1000 recs...

It's obvious that the limit is something internal to the module. I cannot say one way or the other - but it might be worth your time to make a phone call to AMX Tech Support and Engineering. At one time, it was possible to get them to tweak a module for stuff like this since it is obviously just a choice made on the size of the data array chosen in the module. It's not a lot of work for them to jump in and tweak the size and it wouldn't result in a huge hit on resources.

I say "Used to" but don't know if the new climate will result in the same tweak. But, one can always ask.