There are BIG BIG problems trying to do hairpinning on the same box. I went through massive headaches about 4 months ago trying to get fax calls coming in on an E1 on a cat4K AGm to terminate on an FXS port on the same blade, in the end Cisco TAC loaned me an AS5300 (talk about sledge hammer to crack a nut but I ain't complaining) and that fixed the problem.
If you have FXS ports on a seperate box then use them (the VG-248). It seems the boxes can cope with jitter over IP and compensate accordingly, but not over their own back planes.
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...