Describes a modulation profile for an Interval Usage Code for one or more upstream channels. Entries in this table are created by the operator. Initial default entries MAY be created at system initialization time, which could report a value of 'permanent' or 'readOnly' for docsIfCmtsModStorageType. A CMTS MAY reject the creation of additional Interval Usage Codes for a modulation profile being defined at Initialization time. No individual objects have to be specified in order to create an entry in this table. Note that some objects do not have DEFVAL clauses but do have calculated defaults and need not be specified during row creation.