The Available Cell Rate (specified in cells per second) for traffic
transmitted on the interface for this Service Category. This
object is valid only for IMA physical interfaces. This is the
bandwidth available for SVC connections on physical interfaces.
For CBR and VBR Service Categories, this value decreases as a
result of connection setup and increases as a result of connection
release. For ABR and UBR Service Categories, this value changes as
a result of connection setup and teardown only if non-zero mcr is
specified