Hi, I was trying to get the 3CX fax server to email faxes sent to the fax DID number (which is registered with Callcentric) but it just connects briefly and then disconnects. Even if I call the number directly with a cell phone, it connects and then immediately disconnects, no fax tone. I then tried to create another Fax Server in 3CX but it won't allow me to check OR uncheck the box that specifies this extension is a 3CX Fax Server. I'm running 3CX on IIS. Please help me. I've tried doing the whole NAT setup mentioned here: http://www.3cx.com/blog/docs/fax-nat-traversal/ to no avail, so I restored all the settings back to what they were.