This is the Multicast address associated with all devices on this receiver. When a device first registers with HMTS, this value is set as one of the devices multicast addresses. This must be a valid entry in the hmtsMulticastAddrTable, not equal to ff-ff-ff-ff-ff-ff. An attempt to set this value to ff-ff-ff-ff-ff-ff or to a multicast address not in the hmtsMulticastAddrTable will result in a bad value error. This object is non-volatile. The HMTS will automatically set one of the entries in the device's commonMulticastAddressTable to this address, such that all devices that are on this reverse path will have an entry in their commonMulticastAddressTable with this multicast address. Which entry in the commonMulticastAddressTable the HMTS sets is vendor specific.