we are having same issue. We are running os 2000.2-6sr3 ccm 3.3 (3) sr4a. Also appears that when the winmgmt.exe goes to 100% calls from pstn get 5 second delay on answering and can't transfer. Just wondering if anyone else has had same issue?

network-clock-participate wic 0 network-clock-participate aim 0 (slot#) network-clock-select 1 T1 0/0