Solution : https://service.sap.com/sap/support/notes/651497 (SAP Service marketplace login required)
Key words :
call function module rfc_ping, call returns successfully, wrong code page, correct code page, ascii code page 1100, communication code page, previously recommended workaround, -unicode system, reply appears, subsequent rfc
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1084953 | Correct code page when receiving MDMP tables using RFC |
745030 | MDMP - Unicode Interfaces: Solution Overview |