Every few days I have a problem where an AOM loses its association with the master in MMCXXX. It is an iDCS64 paired with an iDCS28. I've tried backing up the software to the media card. I've moved phone ports and AOM ports, but the problem keeps returning. It is running on an OS7400. I can restore or reprogram 209 and everything is fine for a few days. The on site contact says the phone isn't getting unplugged. Any ideas?

Please do not post tech level MMC codes.