For Client Option for CICS and Server Option for CICS only.
The IBM CICS sockets interface is implemented in the Client Option for CICS and the Server Option for CICS. This implementation eliminates compatibility issues and provides these advantages:
An individual listener can handle a socket pool of up to 1000 sockets.
A new listener can be added without requiring system intervention.
An individual listener can be used as both gateway and gateway-less.
For more information, see “Appendix C: Setting Up the CICS Sockets Interface” in these guides:
Mainframe Connect Client Option for CICS Installation and Administration Guide
Mainframe Connect Server Option for CICS Installation and Administration Guide