This object controls the modulus for an SDLC
link station. This modulus determines the size
of the rotating acknowledgement window used the
SDLC link station pair.
A write operation to this administered value
will not change the operational value,
sdlcLSOperMODULO, until the link station is
cycled inactive.
An implementation can support only modulo 8,
only modulo 128, or both.