No, there's no way to configure ringtones based on calling party.
You can only have different ringtones if you're using different lines, if you can configure more than one line on the device create a DN which only room B can reach and configure a different ringtone on the phone for that line.
These are the paths to get to each CCX logs through CLI. They may be helpful if you are having issues accessing RTMT or downloading logs through it.
If you want to download them you have to prefix "file get " and you can add one of the options (re...