Channel 1 on the T1 is in admin state of up and not connected to a call or ringing. "Show isdn status" is best to check if the T1 is up, and this command is good to check what channels are currently in use on the T1.
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...