On the display of my CEM it says SYSTEM ERROR. what is wrong with my CEM?
This error means your CEM has lost its configuration. Best way to fix this problem is to generate defaults in this rack. If you have a multi rack system you will want to remove all functioning CEMs. Then generate defaults on the CEM that has the SYSTEM ERROR. Keep in mind that you will want to generate a multi-rack system. After you have successfully generated defaults on the CEM that had SYSTEM ERROR, insert the rest of the CEMs back into their racks. Then do a rack transfer (refer to user manual) on the CEM that had SYSTEM ERROR so that this CEM now has the same config as the rest of the racks. For complicated systems with custom patch or different module types like D50, D100, or D20F it may be necessary to hire a tech to come in with a SLTA to reconfigure the CEM.