To determine the CA Datacom Server client-to-mainframe compatibility, please review the CA Datacom Server Version Compatibility Matrix on the DatacomServer 14.0 bookshelf on support.ca.com.
See the following link:
https://support.ca.com/cadocs/0/CA%20Datacom%20Server%2014%200-ENU/Bookshelf_Files/HTML/Article-Client-to-mainframe%20Version%20Compatibility%20Matrix/index.htm
This matrix includes the compatibility of DatacomServer 11.0, 14.0 and 15.0, as well as depicting the compatibility of CA Datacom/DB to CA Datacom Server.