Changeover control State:
'undefined(1)' - Link is an undefined state.
'idle(2)' - Link is available and idle.
'wait2(3)' - Wait for MTP2 to initialize link.
'waitForAck(4)' - Waiting for changeover
acknowledgement.
'retrieving(5)' - Packets are being retrieved from
link.
'wait5(6)' - Wait state when transitioning from
idle state.
'wait7(7)' - Delay to avoid message mis-sequencing
on changeover
'wait8(8)' - Wait state prior to processing
changeover order or emergency
changeover order events.