A bit array that contains the bit map representing all available 10Mbit backplane segment and local segment connections for the port. One bit is also reserved to indicate if the cluster has an isolate capability. The first 31 bits of the array represent the backplane numbers, starting from the lower order bit. Bit 32 indicates whether the port has a null connection capability. The bits in the fifth and sixth octets, starting with bits in the lower order octet, represent local segments that the port can connect to. A bit with a value of 1 means that the port is capable of connecting to the corresponding backplane segment, local segment or null segment.