I am having issues with my modems running intermittant Sync loss and bit errors (5-20 minutes depending on speed). If I hook the modems up on a traditional TDM E&M line I do not see these errors. I have set up a lab environment with my 2 ISR's directly connected to prove that packet loss id not an issue. I have tried codec g711ulaw, and Clear Channel; both with the same results. I am seeing the same issue no matter what type of router I use - 3845, 2811, 2651XM ( all running spservicesk9-mz.124-17) I have attached the relavent configs.
Any suggestions would be greatly appreciated