Below are compilation of PI/PO Sync-Async/Async-Sync Bridge with BPM or with module found on various sites. These bookmarks are for my later reference.
Bridges Construction Site (1/3): Asynchronous – synchronous bridge. by Alexey Pitroff
Bridges Construction Site (2/3): Synchronous – asynchronous bridge. by Alexey Pitroff
Bridges Construction Site (3/3): SAP PI bridges – “exotic” and recommendations. by Alexey Pitroff
Configuring Async/Sync and Sync/Async Bridge in the JMS Adapter by help.sap.com
Keep on learning!