What's your busy hour call rate? That's likely to impact the breaking point.
From Cisco's docs:
"For Call Managers and Call Manager clusters, you need a PIM for each Call Manager Cluster that is actively processing calls. Whether you install multiple PIMs on one PG platform or distribute the PIMs across several platforms is a function of the call load that the Call Manager (or cluster) will be handling. In large IPCC configurations that are geographically distributed, Cisco recommends
configuring more Call Manager PGs with fewer PIMs installed on each, rather than placing the maximum number of PIMs on fewer PGs. You want to be sure
that each Call Manager PIM has enough processing power on the PG platform to handle peak Busy Hour Call Rate (BHCR)."
Lee
lmewshaw@simplicti.com
Cary, NC
