The register field is either true or false based on the far end side wanting you to register or not. The dial string is where to route stuff to. sofia/gateway/%trunk/%phone for example... sofia is the freepbx sip stack or something. Forgive me. I do not use FreePBX. Matt ________________________________ From: VoiceOps <voiceops-bounces at voiceops.org> on behalf of Izzy Goldstein - TeleGo <igoldstein at telego.net> Sent: Tuesday, October 24, 2017 12:42:09 PM To: Voiceops.org Subject: [VoiceOps] ICTFAX - configuration has anyone successfully configured ICTFAX on centos ? i am trying to follow the guide, and im stuck with getting the SIP Trunk registered, I want to register the ictfax to a SIP Trunk, I have the trunk information, (host, username, password) but in the GUI it is asking for other information which I don't know what it is, for example the "Dial String" and the "Register" field. Username, I assume is the username used for the SIP Registration Password, I assume is the password used for the SIP Registration Host, I assume is the Server Address, can I use a Fully Qualified Domain Name in this field ? or it has to be a IP Value ? Port, I assume I enter for example 5070, or whatever port the SIP Server is set to listen on add prefix, it has 00 in it. I assume I don't need this, unless the SIP Trunk carrier is asking to prefix all calls with a special value Dial string and Register fields i dont know what to put in there, and leaving it blank does not register the SIP Trunk -- Izzy