Enabling MSC during system definition
You can enable MSC during system definition by defining at least one MSC link with the MSPLINK, MSLINK, and MSNAME stage-1 system definition macros.
When MSC resources are defined by macros during stage-1 system definition, you do not need to specify the MSC= execution parameter.
Recommendation: If
you are enabling MSC in a back-end IMS system in a
shared-queues environment solely for the purpose of processing messages that were received on the
front-end from an MSC link, do not use stage-1 system definition macros to enable MSC in the
back-end IMS systems. Instead, specify the MSC=Y execution
parameter in the startup procedure for the IMS system. The
back-end IMS systems are easier to clone when MSC is enabled by
the MSC execution parameter instead of stage-1 system definition macros.