This read-write object sets the fine-grained performance-monitoring collection interval — either 5 or 15 minutes, defaulting to 15 — applied to every PM entity monitored on the Ethernet NTE GE112Pro Card. Switching this to the 5-minute interval gives admins finer visibility into short-lived error bursts or transient link problems on the Ethernet NTE GE112Pro Card, at the cost of more frequent polling and storage, and it's distinct from the coarser 1-day and rollover PM bins that this setting does not affect. For routine capacity trending on a stable Ethernet NTE GE112Pro Card, an admin would leave this at the default interval-15min rather than generate the extra PM records that interval-5min produces.