where can i get the downloadable linux ISO file?@rentalan
So you have a few options now:
1. Upgrade to Windows 10 -> This will allow you to install 15.5SP6 and/or upgrade to V16
2. Use our linux iso which will allow you to install 15.5SP6 manually if you wish to remain on that version
Please note that your current OS is not supported or tested by 3CX, Windows 7 support ended with 3CX V14 so it is not recommended to run it on that OS. Please refer to the below link for details:
https://www.3cx.com/docs/manual/
Founded in 2005, when VoIP was an emerging technology, 3CX has gone on to establish itself as a global leader in business communications.