I have a customers Avaya Partner ACS phone system that lost power and the back up batteries in the processor were bad. Extension 10 came back up and works but doesn't have access to line 4 anymore. It's the only extension with this problem. I inspected the programming on all the buttons and found that the button for line 4 had a feature called caller ID inspect on it. I removed the feature and reprogrammed the line assignments for all the lines and line 4 still doesn't work. I need to get this figured out today if possible and that's why I'm reaching out for advice.