Current count, from CMTS initialization, of contention request
data minislots defined for this upstream logical channel. This count
includes all minislots for IUC2 assigned to a broadcast or multicast
SID on the logical channel.
This is the 32 bit version of
docsIfCmtsUpChnlCtrExtTotalCntnReqDataMslots,
and is included for back compatibility with SNMPv1 managers.
Support for this object is optional. If the object is not supported,
A value of zero is returned.