The Available Cell Rate (specified in cells per second) for traffic
received on the interface for this Service Category. This object
is valid only for IMA physical interfaces. This is the bandwidth
available for SVC connections. 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