The INP-Delay parameters for each pair of upstream and downstream channels will be in an INP-Delay Profile. To cover all possibilities there will be 4 indices in the vector for INP-Delay Profiles. If less than the maximum number of channels is to be used then the scalars corresponding to non-required channels MUST be set to a null value (0). Entries in this table MUST be maintained in a persistent manner. A default profile with an index of '1' will always exist and its parameters will be set to vendor-specific values, unless otherwise specified in this document. The index of this entry is hwVOPINPDelayConfProfIndex.