When a request is received from another TXSeries for Multiplatforms region, a shortcode is included in the flow that identifies the code page that the transaction is using.
If the transaction on the sending system is using a code page that is not specified in the table, a null value is flowed. Also, non-TXSeries for Multiplatforms regions do not flow code page information. In either case, the default code page that is specified in the conversion template is used. If a shortcode is received that is not in the table, CICS® uses the shortcode as the code page.