This object is used to configure the
Sustainable Cell Rate of a shaper.
SCR is the average conforming cell rate
an ATM connection measured over a time
interval. This measurement allows the
network to allocate sufficient resources
that are less than those based on PCR
and still ensure the achievement of the
desired QOS.
SCR could be unspecified, value set to 0.
If specified, SCR value must be less than
the PCR value.