This attribute indicates the value of the Explicit Forward
Congestion Indication (EFCI) bit of the last data cell received from
the interface.
When a forward Resource Management (RM) cell is turned around
as a backward-RM cell, the Congestion Indication (CI) field of the
backward-RM cell is set to 1, if the value of this attribute is
indicated.
This attribute is set to notIndicated each time a backward-RM cell
is transmitted.