The current state of the session.
up(1) - The service on the remote session is up. The
session has passed the criteria specified in the
corresponding probe.
down(2) - The service on the remote session is down. The
session has not passed the criteria specified in
the corresponding probe.
pending(3) - The system is in the process of determining the
initial state of the session.
disabled(4) - The corresponding probe has been taken out of
service (etsysTrackedObjectsProbeInservice has
been set to 'false').
collect(5) - The system is actively collecting timestamp data
to pass along to the client applications. Only
the sessions whose corresponding probe type is
'icmpTs' (etsysTrackedObjectsProbeType) may be in
this state.