6.2.1.2 Field Descriptions

The request messages contain the following fields.

Field Description
LL The length of the complete request or response message (including this field).
ZZ Reserved for use by IMS; normally zero.
TRAN-CODE For a request message, the transaction code of the IMS server transaction. For a response message, the transaction code of the TMA TCP for IMS gateway.
FILL-CHAR Message fill character (space).