Byte               Field                  Code
1 - 11            Record header
12                Type of activation (1)  BIN
13                Type of message (2)     BIN
14 - 19           Name of the process     EBCDIC
20 - 25           Name of the command     EBCDIC
26                Type of terminal (3)    BIN
27                Address of terminal     BIN
28 - n            Complementary message   EBCDIC