After a little advice, I hunted around for a few hours before I did this but I could not find any articles that said SBS 2011 could not handle multiple FAX devices.
So I have a server which has been running a Multitech Fax Modem since the day the server was installed. Recently the owner of the company wanted to add a second fax line to the system, so i did my research found nothing and ordered a second Multitech modem.
I made one stupid move and ordered a serial modem, as I forgot I only had one serial port and had to use a USB to serial adapter.
I plugged in the modem and Windows was happy all drivers loaded the lot. I went into the Fax Console and everything was fine, 2 modems were discovered and I was able to configure them both.
Shortly after we ran a test and suddenly neither fax line was working. The was no obvious issues on the server and all services were running, therefore I restarted the fax service. This is were it all started to go wrong....
At this point no matter how hard I tried the fax service would not start it just times out eventually and stopped trying. When I unplug the new modem it all works again, reattach the modem it fails...
Can anyone out there shed any light on this matter, as I cannot find any definitive answers online.