Hi All, I have an external SIP FXS gateway that supports 4 analogue phones. (patton) I have never configured FXS extensions with FreePBX before, especially with a remote FXS ATA that supports more than one extension. 1- Do I configure normal SIP extensions on FreePBX? and once ATA is configured with correct parameters (Elastix IP address, sip username, sip password etc...) should it work? is that all that's required? 2- Do I configure a ZAP extensions even thought I am using an external FXS gateway? don't think so... 3- Or should I configure Custom extensions? don't worry too much with Patton configs, i will figure that out but I need to know what kind of extensions should i use and whether or not i need any additional Elastix configs to get this going. Thanks for your help.