We have one subscriber of the 4 sub in our cluster that has occasional high CPU and we go into Code Yellow. Started about a week ago. Happens about 10 times during the business day.
All subs have about the same load with number of phones/gateways, so I don't know why this one is so much higher.
4.1.3SR5b - about 1600 phone and 40 small branch office H323 gateways on each sub