Lets see if this helps... I have a set up in an office in town where calls come into 1 person and they have a pri with 11 lines that show up on her phone. She can place transfer or park or send to vmail or whatever she really wants to do.

I have an eye clinic that has the full 23 channels and they do the same thing, park the call and announce thru page so and so has a call on (insert park location here).

Most of the phones in the second location have park buttons but some do not and for those if the person is at one of those phones they dial the park location.