I am having the same issue. Does anyone have exact details on how to solve this?
Poly tech support told me to:
1. Reset the Obi 202.
2. Buy a new Obi 202.
3. Buy a new phone.
4. Use a "cordless digital phone" and only use a 2-Line phone on Phone port 1 and only use a 1-Line phone on Phone port 2.
I tried all of their suggestions . . . even #4 *rolls eyes*.
While this is marked as solved, the only solution I see is:
NVM, I solved it. Just tweak the ring duration and problem solved.
Does anyone know how this was tweaked that fixed the problem?