Upgrading CUPS to include ipp support
You can receive a FAX and have it directly printed to your printer using the IPP protocol.
To do so, besides the port forwarding to allow the PBX to reach directly the printer port, you need to install a Cups package containing the ipptool command. On CentOS 6, it can be done using the Cups packages available at
http://demo.mirtapbx.com/mirtapbx_support
For example you can run:
yum -y install http://demo.mirtapbx.com/mirtapbx_support/cups-2.2.6-0.x86_64.rpm http://demo.mirtapbx.com/mirtapbx_support/cups-devel-2.2.6-0.x86_64.rpm http://demo.mirtapbx.com/mirtapbx_support/cups-libs-2.2.6-0.x86_64.rpm http://demo.mirtapbx.com/mirtapbx_support/cups-lpd-2.2.6-0.x86_64.rpm