My problem is getting this MSI/driver to handshake/interface with the built-in fax server in the 3CX voice platform. This product seems to be an add-on outbound driver for the included inbound fax receiver built into 3CX V8+. It supports being installed on SBS2008 or any Server 2008 that has the Server 2008 Fax Server previously installed on it, or installed just prior to the installation of this 3CX fax "driver" MSI. The online documentation for this new outbound server "driver" seems to be for a previous version since the instructions don't quite match the way this new version installs itself and interacts. My experience was that this MSI installs eight (8) 3CX Fax Devices under Microsoft Fax Server Manager on Server 2008/SBS 2008, labeled device 0 through 7. Since SBS 2008 and Server 2008 only allow licensing of 4 installed and operational fax devices, four of the eight devices are not activated for send or receive. It seems Microsoft disables devices 0, 1, 2 & 3 and sets devices 4, 5, 6 & 7 as usable/assignable devices. I am successfully able to initiate a fax "SEND" from the Microsoft Windows Fax & Scan Client on either an attached workstation or on the server itself but the fax never gets sent. I see in the Microsoft Fax Server Manger on the SBS 20008 server that Fax Device 4 shows sending and I see in the status on the client I'm sending from that shows Initializing, but when I look at the 3CX Management Console under the Server Activity Log, there is no indication the 3CX application has a clue the 3CX MSI or Microsoft Fax Server is trying to send a fax; the server log just remains blank. This is a fully licensed version and not the free version so this all should work. In any case, the SBS 2008/Server 2008 Fax Server retries a few times and eventually lists a FATAL ERROR and no fax ever seems to be sent. There is no indication at all on the 3CX PBX side that anything having to do with faxing ever happened. This is quite perplexing. I have uninstalled and reinstalled the 3CX FAX MSI a few times now and it still does the same thing with no error messages or anything else during the install process. Quite mysterious... Has anyone had any experience with this. I was surprised that the MSI tried to install 8 fax devices when the installation Wiki says it is only supposed to installs one... so this immediately set off some alarm bells... but with out-of-date documentation it is hard to know really what to expect from this MSI. Thanks in advance for any advice going forward. This is not a quality or transport issue at all since Server log never shows an attempt is even made to send. This is more of an issue regarding why the 3CX FAX MSI either is not accepting the fax from the Windows 2008 Fax Server correctly or the 3CX MSI is unable to communicate correctly with the 3CX master server to begin a transmission/send sequence.