ISC between IMS and CICS

The following table identifies the ISC functions that are provided by CICS® and IMS, and the IMS facilities that are available to users of CICS START or RETRIEVE, and SEND or RECEIVE.

Table 1. Facilities available to CICS START RETRIEVE and SEND RECEIVE USER
Function	Front-end system	Back-end system
Distributed Transaction Processing Initiate remote transaction	CICS¹	CICS¹
	CICS¹	IMS non-response type
	IMS all transaction types²	CICS¹
	IMS all transaction types except conversational²	IMS all transaction types except conversational²
Distributed Transaction Processing Application-to- Application Conversation⁵	CICS³	CICS³
	CICS³	IMS Response Conversational Fast Path
Distributed Presentation Management⁵ Using distributed transaction processing	IMS MFS map	IMS MFS map
	CICS user application⁴ IMS MFS map	IMS MFS map CICS user application⁴

Note:

Using CICS START or RETRIEVE commands.
If the transaction in the processing subsystem is a response mode or Fast Path transaction, a nonresponse transaction type is required in the originating system to handle the reply from the processing subsystem.
Using CICS SEND or RECEIVE commands.
The user application can optionally invoke BMS to aid in mapping functions between CICS and the terminal.
This function is not supported in ISC links that use TCP/IP.