MSC and IMSplexes with shared queues

The following topics discuss the coexistence of a Multiple Systems Coupling (MSC) network with an IMSplex with shared queues. MSC and IMSplex coexistence can be temporary, such as when migrating from an MSC network to an IMSplex configuration, or permanent, such as when an MSC link connects an IMSplex to an IMS system outside of the IMSplex.

A primary concern when an MSC network and an IMSplex coexist is the proper routing and processing of your transaction messages across both the MSC and IMSplex environments, because each environment uses a different routing method.

Generally, MSC networks route transactions to specific IMS systems using SYSIDs, while IMSplexes with shared queues route transactions by making them available on the shared queue to any IMS system that registers an interest in the transactions. When an MSC network and an IMSplex with shared queues coexist, both of these methods of routing can apply to transactions.