This attribute specifies the default cell delay variation tolerance
(CDVT) for all connections of the CBR service category except
those managed by a Vpt CA. An override to this default may be
specified for a provisioned connection under the Vcd Tm or Vpd Tm
component.
This attribute is used by the CAC function to compute the
equivalent cell rate (ECR) required by a given CBR connection. The
larger the value of CDVT, the larger is its ECR.
If Usage Parameter Control (UPC) is enabled for a connection,
CDVT is used by the UPC function to decide whether a cell is
conforming or non-conforming based on the connection's traffic
descriptor type. The larger the CDVT value, the more tolerant is the
UPC of bandwidth usage beyond the traffic contract.