Hi again, I am attempting to automatically provision a Cisco SPA504G IP phone using this guide: http://www.3cx.com/sip-phones/cisco-spa/ For some reason my phone is not taking the configuration. I'm wondering if my firmware version is perhaps incompatible. I have v 7.5.5. The guide states: "We have tested this guide with the latest firmware versions supported by 3CX Phone System 11 & 12" Is there somewhere where there is a list of the latest firmware versions supported by 3CX Phone System 12? Thank again for the help.