Welltech SPCI2S Intel NetStructure SS7 Boards - Manual (Page 48)

SS7 Programmer’s Manual for SPCI2, SPCI4 and CPM8 Issue 2 Page 48
flags
This field is a 16 bit field containing run-time configuration options for the route
as follows:
Bit 0 is set to 1 to indicate that a second link set is contained within the
message. If zero the second_ls field is ignored.
Bit 1 is used to determine whether or not to load share messages across the
two link sets. It is only used when two link sets are specified for the route.
When set the MTP3 module will load share messages for the destination
equally across each of the two specified link sets. Otherwise the MTP3 module
will consider the normal link set to be the preferred link set and will only use the
second link set in the event of failure of the normal link set. The bit should be
set to 1 to enable load sharing across the two link sets or zero to disable load
sharing and use preferred and secondary link sets.
All other bits are reserved for future use and must be set to zero.