Can you provide us a reason you would want to do this? As stated FXO line is always tied to one incoming called number, perhaps you meant FXS/DID line which can have mutliple DIDs arive on the same port in which case you can use the command.
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...