What signal is the live event?

Hi,

what are the meaning of each integer (0-4) in the liveStatus API function:

liveStatus:integer
_ Enum: 0, 1, 2, 3, 4_
_ readOnly_
_ Enum Type: KalturaEntryServerNodeStatus_
_ the status of the entry of type EntryServerNodeStatus_

Is it possible to know if the live event is receiving from the main rtmp signal or the backup rtmp signal?

thanks

Lluís