This object controls the maximum number, (1.....127) of
unacknowledged frames which an SDLC link station may receive. This
will range from one to modulus minus one. The modulus is controlled
by the object: wfSdlcLSAdminModulus. A write operation to this
administered value will not change the operational value,
wfSdlcLSOperMAXIN, until the link station is cycled inactive.