The RP2D is essentially just two ID-1's in a rack mount box.
See the photo's section of the dstar_digital group:
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--- In D-STAR_23cm@..., "let_cyber" <kb2ayu@...> wrote:
Thanks for the comments regarding my disappointment with the DD mode.
I seem to remember a ham in Canada using 2 ID1's back to back as a full duplex repeater. Has anyone tried this? Any downside? (except for the cost of 2 radios).
Al