I had the worst time trying to make Speed Dials work. I read all the posts, and no matter what I did I could not make all my speed dials work. It seemed to be confined to specific numbers but I could discern no pattern.
After a day of methodical trial and error, I noticed that when I pressed delete manually, the last character of some of my speed dial numbers did not disappear: there was a control character there! This is invisible and somehow came about the way I cut/pasted those numbers.
Shame on ObiTalk for not filtering the fields of these invisible characters. I'm sharing here in case anyone else has a problem making speed dials work.