Determines if the Cisco 90 Series channel unit or the downstream
BRITE cards is doing segmented or path performance monitoring as
specified in Bellcore document TR-NWT-000397. Only segmented
performance monitoring should be used. In segmented PM, CRC
errors are counted on each segment of the loop, instead of
over the entire path. If no BRITE cards exist in the system,
there is no difference between segmented and path PM
1=Segmented. 2=Path.