A CAS/DS0 group entry. Each entry consists of the CAS
group type and the CAS/DS0 group associated DS0
channels in a T1/E1.
The value of ccasGrpCfgDs0Channels must be specified
with at least one available DS0 channel in the CAS
group associated T1/E1 before a new row in this table
can become active(1).
The entry of this table can only be created if the
CAS/DS0 group associated DS1 ifEntry already exists.