Enabling back-end processing of APPC and OTMA messages using a remote transaction

To use a remote transaction to process APPC and OTMA messages on back-end IMS systems within an IMSplex, perform the following steps.

Procedure

  1. Enable MSC in all IMS systems in the IMSplex by defining at least one MSC link in each IMS system in the IMSplex. This MSC link can be either a functional link to a remote IMS system outside of the IMSplex or, if none exists, it can be a non-functional MSC link.
  2. In the IMS system connected to the APPC or OTMA client, define a remote transaction for the APPC or OTMA messages by specifying the SYSID keyword on the TRANSACT macro.
    In the SYSID keyword, the remote SYSID can be any remote SYSID. The local SYSID should match the SYSID of the IMS system connected to the APPC or OTMA client.
  3. In all back-end IMS systems, define a local transaction to process the APPC or OTMA messages.
  4. Register the remote transaction with the IMSplex by starting the transaction and the dependent regions that process it.