The system history log will contain this:Product Name - Cisco Unified Communications Manager Product Version - 7.1.0.39000-9023 Kernel Image - 2.6.9-67.ELin this case where 2.6.9-67.EL is the linux distro.Hope this helps,Chester
Depending on where you are sending the fax, you should be using t38: https://supportforums.cisco.com/document/126086/spa-ata-fax-t38-basic-configurationHope this helps.....