You can import a text file into OTM and then push it out to your PBX. Otherwise, the file is generated off of what you have on your PBX. We use our personel file out of HR and strip is down to what we want to see on the phone. You must have the CLS of CRPA, corporate directory allowed on the sets as well. I know this is vague, but this might get you going in the right direction.