I17 Interchange Acknowledgment Code
TYPE=ID MIN=1 MAX=1
This indicates the status of the receipt of the interchange control structure
A The Transmitted Interchange Control Structure Header and Trailer Have Been
Received and Have No Errors.
E The Transmitted Interchange Control Structure Header and Trailer Have Been
Received and Are Accepted But Errors Are Noted. This Means the Sender Must Not
Resend This Data.
R The Transmitted Interchange Control Structure Header and Trailer are Rejected
Because of Errors.