Oops...NOW I see why my efforts did work.
OBI EXPERT vs. LAN SYNC PROBLEM
If any Obihai folks are here, just know that I've been working within the Obi200 box ON MY LAN instead of the OBI EXPERT CONFIGURATION MENU.
There is a difference and the two are not in sync. Settings I made in the box on my LAN—and I could see were set up properly after reboot—WERE NOT reflected in the Obi Expert Config.
After "unchecking OBiTALK Settings AND Device Default" as stated above within the Obi Expert Config, the device is shown as offline (even though inbound and outbound calling work perfectly).
Bottom line? Both SP1 and SP2 are *still* both ringing the default ring.