The time-out value used to recover from
various-related error situations [9].
If N is the maximum number of stations on
the ring, the value of this timer is
normally:
dot5TimerReturnRepeat + N*dot5TimerHolding.
Implementors are encouraged to provide
read-write access to this object if that is
possible/useful in their system, but giving
due consideration to the dangers of
write-able timers.