This is the run-time (currently effective) value of whether to check ring status for possible problems caused by currently-inserted stations (TRUE gives quicker discovery of stations with an invalid frequency, at the cost of extra overhead on legitimate ones). Valid range is a boolean (FALSE/TRUE); factory default is FALSE. This is a read-only snapshot of what's actually in effect right now -- to change it, an admin must set fibTmuFunctChkRingInsPerm and then reset the system, since the new value only takes effect in this Run object after a reset. Admins enable this if faster detection of frequency-mismatched stations is worth the added overhead on a busy ring.