A read-only Counter32 recording how long it took the link to first acquire synchronization after it was administratively configured up. A long initial sync time can indicate the subscriber unit is having difficulty finding the head end's signal at all, which is a different problem from losing sync after it was already established. For example, an installer bringing up a new subscriber unit at a marginal site would watch p2mpSuInitialSyncSeconds to judge whether the unit struggled to find the signal at all before settling in, which might prompt an antenna realignment before declaring the install complete.