There is a nice "how-to" slideshow for CDR, Collecting Agent, and Performance Management available via the Siemens Training Center in Irving, TX. Perhaps someone who has attended the HiPath 4000 Advanced class (Texas only) in the last 5 years can share that slideshow here.
Performance Management (PM) is a rich reporting tool that is primarily used to generate historical traffic reports using CDR records as the data, but can also be used to measure system load via AMO ZAUSL. But since PM is a Unixware-based app, and CDR is stored within RMX, the "Collecting Agent" is needed to fetch the CDR data from RMX and make it available to the PM app. The mechanics of this process are complex. The Training Center slideshow not only shows how to configure each of the three components, but it also explains how it all works. It is highly recommended that only experienced and/or trained Siemens field engineers attempt to implement PM.