Describes the operational status of this FDDI serial
controlled module.
insertFNB1(1) - The serial controlled module is
inserted into FNB-1 and bypassed from FNB-2.
insertFNB2(2) - The serial controlled module is
bypassed from FNB-1 and inserted into FNB-2.
insertFNB1FNB2(3) - The serial controlled module is
inserted into both FNB-1 and FNB-2.
bypass(4) - The serial controlled module is bypassed
from both FNB-1 and FNB-2.