Have customer with CM 5.2.1 and they have many 9641 telephones administered as 9650 - however the missed call log is not working and the sets have H.323 SP 3 loaded and customer is going to install SP 4, however the SP did not mention in the release notes that it corrects miss call log. I am thinking the issue is in the 46xxsetting.txt file - however I am not sure. I am unable to find anything pertaining to this on Avaya support.