I am posting on this again as the 245-500V still appears in the LCD of 200.

200 is the owner of 245 and when she presses 245 and does # she gets a busy signal and can't continue. There is no MSG light on 200 for 245 so #409 wouldn't work wither.

The Activate Message Waiting (FB41) is off for all phones in this PBX and as far as I know 200 is the only one with the issue. 245 rings on a button on ext. 200 and she does transfer calls to other users on the system. I believe if a call comes in on 245 and isn't answered it goes to mailbox 245.

Anything else I can try?