Hex path identifier for the escon director switch port
containing the fiber from the channel on the host to
which this CMCC CLAW task connects.
This is a concatenation of the switch port number, the
channel logical address (used by the host to associate
an logical partition (LPAR) with the control unit), and
the control unit logical address (address of a logical
control unit used by the host to associate a group of
physical devices).
For a directly connected channel, the switch port number
is usually 01.