The number of times that the SU changes the connectivity
state from 'offline' to 'online' over the time period from
the SU's first ranging message received by HE until now.
The SU is considered as 'online' when the value for
cwdxHeSuStatusValue is any of the values: online(5),
onlineNetAccessDisabled(6), onlineKekAssigned(7), and
onlineTekAssigned(8), and the SU is considered as 'offline'
for other values for cwdxHeSuStatusValue.