Okay, humor me here. I have a Cisco 7204VXR running IOS 12.3.7t with a PA-MC-T3 card installed in it. All 28 T1's are channelized. I'm getting errors on the serial interfaces on both ends of the private link and I think it might be caused by incorrect line coding however there is no way to change the line code, at least that I can see, on a channelized T1. The frame, input, and crc errors in most cases are less than 1% but I'm hoping to try and eliminate that if possible.
Any helpful hints, documentation on setting the line coding, or even a sample config of a channelized T3 setup would be helpful.