A read-only Counter32 counting how many times the subscriber unit had to scan through the channels to reacquire sync after losing it, following the initial sync at Link Admin Up. Because a full channel scan takes noticeably longer than a quick medium-effort recovery, a high value here means the unit is regularly enduring longer outages while it searches for the signal rather than reacquiring almost instantly. For example, a unit with a rising p2mpSuSyncHighEffort count would likely be experiencing noticeably longer service interruptions each time it drops sync compared to a unit whose recoveries stay in the medium-effort category.