The following parameters common to all calls.
- function code and interface level
- A 4-byte character string consisting of 2 characters indicating
the function being requested followed by a value indicating the interface
level. The only valid value for interface level in this release is X'0001'.
- mtoken
- A 4-byte field that contains the module token provided by fast
data. This token must be initialized to binary zero before the first
call of a sequence.