The MIB module for the management of LCT(Local Craft Terminal)logon.
        
When the LCT user logs in, NE notifies to NMS the login information
of LCT user. Similarly when the LCT user logs out(including abnormal
exit), NE will report to the NMS that LCT user logs out.
        
After the LCT user logs on NE(Network Element), a session is created
between the NE and the LCT. To maintain the session, LCT user sets 
heartbeat operation periodically.
        
If LCT user does not set the heartbeat operation within a period of 
time(TimeOut), NE will determine the LCT user's link is abnormal and
disconnect the LCT session.