I am setting up the obi for use in Brazil. I was able to adjust the dial tone to match the Brazil Standard
(425-16,425-16,450-16;20)
I was scratching my head where to change parameter controlling the ring you hear when making a call.
I finally realized it was the Ring Back Tone Parameter. I am using Tone profile B to make all my changes .
The original ring back tone in profile b:
400-18,425-18,450-18;-1;(.4+.2,.4+2)
The correct one for Brazil
425-18;-1(1+4)
This is the correct tone , a long tone with 4 seconds of silence.
Larry