Hi, I upgraded my PBX from Elastix 1.5 to 1.6 then after update process, one of my FXS ports fails, incoming calls receives inmediatly unavailable message "The person in the extension xxxx is not available" however I can run outgoing calls from this extension (FXS), also all the others FXS extensions are working well. What can I check? Dahdi module is load well. Echocanceller is mg2. I replaced the phone in order to discard any issue with the equipment. Regards.