This object contains a 4096 bit vector indicating VIDs passing through the ring, without being terminated like data VLANs are. The high order bit of the first octet corresponds to the first bit of the vector, while the low order bit of the last octet corresponds to the last bit of the vector. A bit that is on (equal to 1) indicates that the corresponding VID is a passthrough VLAN. An example: If the first octet is 0x70 the rest are 0, VIDs 1-3 are passthrough VLANs.