VTAM® issues this message as part of a group of messages in response to a DISPLAY ID command for a line or a line group.

puname is the name of the physical resource associated with the resource (a logical line or line group containing logical lines or a transport resource list element) that is being displayed.

If the physical unit, defined in the NCP definition, whose name is specified by the PHYSRSC keyword is a switched PU that is not currently connected, then highernode is the physical line.