Bye the way this is my first telephony implementation after doing my Tisco-telephony-Certification last year. So I may be making mistakes in my config???
So, I managed to configure my telephony service good enough to receive calls and redirect them to one of my IP Phoses using "connection plar" command on my four voice-port. I can effectively place outside calls also. I then configured Unity Express using the wizard, and I believe that my config is good, but when I call to my telephony service (from an outside telephone), my auto-attendant is not responding, all my calls are still redirect to my IP phone mentionned with the "connection plar" command, as if the "connection plar" command have the priority on incomming calls. So I join the configuration of my router and the configuration of my unity express, so someone could tell me what I do wrong!
Thank you very much for helping me