I am having the exact same problem as the original poster. When I connect an analog phone to the ATA and make a voice call, there is no problem. I want to change to H323 image and try my luck. But the link you posted takes me to the IP Telephony forum, not to the particular discussion on the issue. Could you be kind to post the correct link?
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...