I manage an OPT 81 with release 4. I had an issue with one of my clock cards (NTRB53AA) on side 1. Had it replaced with a NTRB53AAE5. First off is there a difference between the two cards? would there be any issues with replace one with the other? I notice when I do a SSCK full on both cards there is no uart. Also the new card does not list its card ID. When I am running on cc 1 I get PLL lock loss errors on all of my remotes. When I run on CC0 I get frame slips on my PRI cards and then end up going to red alarm status.