Current count, from CMTS initialization, of unicast granted mini-slots on the upstream logical channel, regardless of burst type. Unicast granted mini-slots are those in which the CMTS assigned bandwidth to any unicast SID on the logical channel. However, this object does not include minis-lots for reserved IUCs, or grants to SIDs designated as meaning 'no CM'. This is the 32-bit version of docsIfCmtsUpChnlCtrExtUcastGrantedMslots, and is included for back compatibility with SNMPv1 managers. Support for this object is mandatory. Discontinuities in the value of this counter can occur at reinitialization of the managed system, and at other times as indicated by the value of ifCounterDiscontinuityTime for the associated ifIndex.