This poster reproduces diagrams from the corresponding IBM Z YouTube channel video "The Lifecycle of an IMS Connect Transaction": https://youtu.be/ygG9D6mfLDA and the developerWorks recipe of the same title: https://developer.ibm.com/recipes/tutorials/the-lifecycle-of-an-ims-connect-transaction/ I created this poster for my own use, because I kept referring back to the diagrams in the recipe to help me analyze IMS Connect transaction events. Instead of having to repeatedly flick to a window (or browser tab) showing these diagrams, I now have this A3-sized color poster on the wall.

1. Client IMS Connect IMS
XCF OTMATCP/IP Message queue
MPR
MPPSocket
IMS Connect Extensions
User message exit
004A
0049003C 003D 003E 0041 01
08
31
35 5607 31
03004200A3
00A300A4
003D003E 00A6
ReadIRM
Response
Read function
Write Transmit function
5616
50nn
5E
Client IMS Connect IMS
XCF OTMATCP/IP Socket
IMS Connect Extensions
User message exit
004A
0048
00490049 003D 003E 0041 33
5610
3730 33 56120042004600A3
00A300A4
003D003E 00A6
ReadAcknowledgment
Confirmation
Read function
Write Transmit function
MPR
Response
awaiting
confirmation
MPP
07
IMS Connect send-then-commit, sync level confirm OTMA transaction lifecycle
Request and response
Acknowledgment and confirmation
Event numbers shown in hexadecimal.
00Ax indicates an IMS Connect Extensions trace event.