Binds filter groups to modems, identifying for each modem the upstream and downstream filter groups that apply to packets for that modem. Normally, this table reflects the filter group values signaled by DOCSIS Registration, although values may be overridden by management action. For each of the columns in this table, zero is a distinguished value, indicating that the default filtering action is to be taken rather than that associated with a filter group number. Zero is used if the filter group is not signaled by DOCSIS registration.