ACC X.25 Protocol User's Guide

Appendix A 131
X.25 Status and Completion Messages
Introduction
mhdp->mrq.mrqcode will contain the value
ZCOM_MRQCODE_WRITE to
indicate the response message
contains buffer completion status for
a w rite request (zsend). Usually, this
indicates an error condition.
mhdp->mid.mzsrce.zlu will contain the ZLU number of the
X.25 link or Virtual Circuit the status
message is associated with.
mhdp->mrq.mrqstat will contain one of the status codes
listed below in the lower seven bits of
the field (e.g. bits 0-6).