In the past, I have used a product called Variphy. It does a great job of auditing CUCM and Unity. But if you were to do it manually, Id start with:
- voice infrastructure High Level.
- voice infrastructure low level (detailed down to which switchport each component is plugged into and IP addresses
- move into a low level type document as if you were designing.
- Server names and naming convention
- Use the CUCM Admin page as your guide for the document (System, Route Plan, Devices, etc)
- The gatekeepers and gateways, you will need to break out. I typically copy and paste the running config to the document and then create RED next each line WHY it is configured this way. For Gatekeepers, you need to spell out each zone, naming convention used, route plan and end points, etc.
- Document the versions of the software used, etc.
