This is a read-only counter tracking the total number of frames that arrived on this physical unit's channel but had to be aborted mid-reception rather than completed normally. A rising count signals that the link between the unit and its attached device is dropping frames partway through, which usually points to a noisy line, a clocking problem, or a flaky cable rather than normal traffic loss. For example, if statPuChAborts jumps by several hundred overnight on a branch-office unit, an administrator would suspect the serial cable or interface card feeding that channel and schedule a physical inspection.