Hi,
I solved temporaly my problem, downgrading to version -688. Starting from -716, callback is not working (I have no versions between -688 and -716).
Seems really to be a problem with 7xx versions, probably due to compatibility with some of other component (libpri, asterisk, zaptel...).
I'm afraid to update these other components without being sure, especially because I'll be obliged to upgrade to asterisk 1.25 and to dahdi...
About the forwarding, I had a bad syntax with external numbers. I did not try with 7xx version and good syntax, so I'm not sure if it was really not working... But working well with -688 version.
This solution is good for me, waiting a better one. I think that the simplest will be to update all or at least a part of other components. If somebody could tell me how to do to be safe, I would appreciate.
Thks.